Katherine Schwarzenegger is an angel in white as fiance Chris Pratt gives her a 'sweet toast' during bridal shower... with guests including Oprah and dad Arnold

Katherine Schwarzenegger enjoyed quite the star-studded bridal shower on Saturday, with even Oprah Winfrey gracing the the bride-to-be with her attendance. 

But according to lucky event-goers, it wasn't the talk-show Queen's appearance that stole the show, it was husband-to-be Chris Pratt's, 39, 'sweet toast'. 

Insider's told People on Sunday that when the Avengers star arrived towards the end, the 29-year-old's face just lit up.  

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Bride-to-be: Katherine Schwarzenegger looked as angelic as ever when she was seen stepping out ahead of her bridal shower and mom Maria Shriver's home on Saturday

Bride-to-be: Katherine Schwarzenegger looked as angelic as ever when she was seen stepping out ahead of her bridal shower and mom Maria Shriver's home on Saturday

'Katherine lit up when Chris arrived,' they said. 

'He also gave a sweet toast. They were adorable together and he wanted her to have all the attention.' 

The party was held at her mother Maria Shriver's Brentwood home and insiders added that she went 'all out' for her daughter. 

Love: [Chris] 'gave a sweet toast. They were adorable together and he wanted her to have all the attention'

Love: [Chris] 'gave a sweet toast. They were adorable together and he wanted her to have all the attention'

Stunner: Slipping into a white form-fitting dress, the blogger showcased her trim frame and natural beauty

Stunner: Slipping into a white form-fitting dress, the blogger showcased her trim frame and natural beauty 

Man of the hour: Chris was also dressed to the nines in a blue and white checkered button-up shirt and dress pants

Man of the hour: Chris was also dressed to the nines in a blue and white checkered button-up shirt and dress pants

'Maria definitely went all-out for the shower but it still felt very down-to-earth and intimate inside. There were fun games and a flower station where guests could make arrangements, and a gospel choir sang several songs,' the source said.' 

And while it's not known when their wedding will take place, Katherine sure looked like a bride-to-be. 

Slipping into a white form-fitting dress, the blogger showcased her trim frame and natural beauty.  

Katherine's dress was help up by thin straps before ruffling down into slight tiered fringes. 

An angel: The beauty styled her brunette tresses into waves and swept to one side. Her locks were pinned back with a statement clip

An angel: The beauty styled her brunette tresses into waves and swept to one side. Her locks were pinned back with a statement clip

Look who's here! Oprah kept things chic and casual for the chilly Los Angeles Spring day

Look who's here! Oprah kept things chic and casual for the chilly Los Angeles Spring day

She teamed the look with nude pumps and accessorized with a dainty bracelet, earrings and her diamond sparkler. 

The beauty styled her brunette tresses into waves and swept to one side. Her locks were pinned back with a statement clip.  

Katherine's glam featured radiant skin with contoured cheekbones, blushed cheeks and a nude lip to finish it off. 

Chris was also dressed to the nines in a blue and white checkered button-up shirt and dress pants. 

Gorgeous: She wore a blush colored blazer and grey trousers with her dark locks slicked back into a ponytail

Gorgeous: She wore a blush colored blazer and grey trousers with her dark locks slicked back into a ponytail

Keepsake: And it appeared as though Oprah had a grand time at the A-list engagement, leaving Maria's home in high spirits with her beautiful flower bouquet she created

Keepsake: And it appeared as though Oprah had a grand time at the A-list engagement, leaving Maria's home in high spirits with her beautiful flower bouquet she created

Here for his daughter: And Chris wasn't the only man who made his way into the party, Katherine's dad Arnold Schwarzenegger also made an appearance

Here for his daughter: And Chris wasn't the only man who made his way into the party, Katherine's dad Arnold Schwarzenegger also made an appearance

Oprah kept things chic and casual for the chilly Los Angeles Spring day.  

She wore a blush colored blazer and grey trousers with her dark locks slicked back into a ponytail. 

The media mogul even ensured her exquisitely wrapped present matched her ensemble, walking in with a rectangular gift with a beautifully tied forest green bow on the top.  

And it appeared as though Oprah had a grand time at the A-list engagement, leaving Maria's home in high spirits with her beautiful flower bouquet she created.  

And Chris wasn't the only man who made his way into the party, Katherine's dad Arnold Schwarzenegger also made an appearance. 

Calm before the storm? As he stepped out of the black SUV, Arnold appeared to be enjoying a cigar

Calm before the storm? As he stepped out of the black SUV, Arnold appeared to be enjoying a cigar 

Big day of Arny! The former Governor of California was slightly late to the party, first stopping by his son Joseph Baena's college graduation

Big day of Arny! The former Governor of California was slightly late to the party, first stopping by his son Joseph Baena's college graduation

Didn't want to steal the spotlight: Arnold kept a low profile with a dark shirt underneath a complimentary suit

Didn't want to steal the spotlight: Arnold kept a low profile with a dark shirt underneath a complimentary suit

Fans: Arnold appeared to be popular with the guests, spotted hugging them as he left the celebration

Fans: Arnold appeared to be popular with the guests, spotted hugging them as he left the celebration 

The former Governor of California was slightly late to the party, first stopping by his son Joseph Baena's college graduation. 

Arnold kept a low profile with a dark shirt underneath a complimentary suit.  

He accessorized with some tinted shades and appeared all smiles while at his wife's home - despite her filing for divorce from him in 2011, eight years ago. 

As he stepped out of the black SUV, Arnold appeared to be enjoying a cigar. 

Arnold also appeared to be popular with the guests, spotted hugging them as he left the celebration. 

Scored an invite! Whitney Port was also one of the stars to get an invite to the shower of the year

Scored an invite! Whitney Port was also one of the stars to get an invite to the shower of the year

Gorgeous: The mom-of-one stunned in a moss green satin frock that featured long puffy sleeves and was of a mini length

Gorgeous: The mom-of-one stunned in a moss green satin frock that featured long puffy sleeves and was of a mini length

Natural beauty: Whitney's blonde tresses were styled back into a low bun and her glam was kept minimal to a sweep of blush and a nude lip

Natural beauty: Whitney's blonde tresses were styled back into a low bun and her glam was kept minimal to a sweep of blush and a nude lip

Her connection: While it's not known how close she herself is to the Schwarzenegger/Pratt family, her sister Abby is currently dating Katherine's brother Patrick

Her connection: While it's not known how close she herself is to the Schwarzenegger/Pratt family, her sister Abby is currently dating Katherine's brother Patrick

Sharing them around? And while many guests were seen walking out with one bouquet of flowers, Baskin had her hands quite full with various bunches

Sharing them around? And while many guests were seen walking out with one bouquet of flowers, Baskin had her hands quite full with various bunches

Whitney Port was also one of the stars to get an invite to the shower of the year. 

The mom-of-one stunned in a moss green satin frock that featured long puffy sleeves and was of a mini length. 

The 34-year-old Hills star complimented her chic look with yellow framed shades and a basket bag.  

Whitney's blonde tresses were styled back into a low bun and her glam was kept minimal to a sweep of blush and a nude lip. 

Justin Bieber's old flame Baskin Champion also made an appearance at the event. 

While it's not known how close she herself is to the Schwarzenegger/Pratt family, her sister Abby is currently dating Katherine's brother Patrick. 

And while many guests were seen walking out with one bouquet of flowers, Baskin had her hands quite full with various bunches. 

Mom to the rescue: The event was held at Katherine's journalistic mom, Maria Shriver's home in Brentwood, Los Angeles

Mom to the rescue: The event was held at Katherine's journalistic mom, Maria Shriver's home in Brentwood, Los Angeles

Enough room, food, and drinks for all! Overhead shots of the garden party saw eleven round and rectangular tables set up for guests with various stalls for food and beverages

Enough room, food, and drinks for all! Overhead shots of the garden party saw eleven round and rectangular tables set up for guests with various stalls for food and beverages

Family and friends: While there is no date for the wedding set at this time, sources have previously revealed earlier in the year that their ceremony will be a smaller and intimate affair

Family and friends: While there is no date for the wedding set at this time, sources have previously revealed earlier in the year that their ceremony will be a smaller and intimate affair

She said yes! Katherine and Chris announced their engagement back in January, following his divorce from Anna Faris in 2017

She said yes! Katherine and Chris announced their engagement back in January, following his divorce from Anna Faris in 2017

The event was held at Katherine's journalistic mom, Maria Shriver's home in Brentwood, Los Angeles. 

Overhead shots of the garden party saw eleven round and rectangular tables set up for guests with various stalls for food and beverages. 

While there is no date for the wedding set at this time, sources have previously revealed earlier in the year that their ceremony will be a smaller and intimate affair.

'They don’t want it to be a circus,' the source said, adding: 'The focus will be their commitment to each other, and God will play a very large role on their big day.'

'It’s been such a special time not just for them, but also for their families. Everyone is so excited,' they added.

Another source recently added that they are so compatible because they, 'have a lot in common. 'Family is very important to both of them, as well as their spirituality.'

Katherine and Chris announced their engagement back in January, following his divorce from Anna Faris in 2017. 

Chris shares son Jack, six, with Anna.  

The morning after: Katherine was spotted in all black on Sunday running errands with friends following her shower

The morning after: Katherine was spotted in all black on Sunday running errands with friends following her shower 

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Katherine Schwarzenegger receives 'sweet toast' from Chris Pratt

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