No Monday blues! John Stamos looks sharp in all black as he suits up for Jimmy Kimmel appearance with girlfriend Caitlin McHugh by his side

He's got a lot to smile about.

And John Stamos beamed ear to ear as he headed to Jimmy Kimmel with his girlfriend Caitlin McHugh by his side.

The 53-year-old actor, who stars on Scream Queens, looked dapper in a black suit with a matching button up on Monday in Hollywood. 

Peace: John Stamos beamed as he headed to Jimmy Kimmel on Monday in Hollywood

Peace: John Stamos beamed as he headed to Jimmy Kimmel on Monday in Hollywood

The former Full House star looked handsome in black slacks and a blazer.

John, who opted for a no tie look, hit the pavement in black dress shoes as he toted a camera in one hand.

The TV star finished off his dapper look with aviator sunglasses and combed back hair.

Actor Caitlin, 32, looked lovely in a blue, red, pink and white floral dress that showed off the beauty's svelte frame. 

Staying close: The 53-year-old actor, who stars on Scream Queens, arrived with his girlfriend Caitlin McHugh

Staying close: The 53-year-old actor, who stars on Scream Queens, arrived with his girlfriend Caitlin McHugh

 Happily in love: Caitlin, 32, looked lovely in a blue, red, pink and white floral dress that showed off the beauty's svelte frame

 Happily in love: Caitlin, 32, looked lovely in a blue, red, pink and white floral dress that showed off the beauty's svelte frame

The actress and model paired the thigh-grazing frock with nude high heels while carrying a matching hued clutch.

Caitlin, who starred in Wild For The Night, wore her brunette tresses loose as she kept her makeup minimal.

John and Caitlin were first spotted together publicly in March.

Fun day out: John and Caitlin were first spotted together publicly in March

Fun day out: John and Caitlin were first spotted together publicly in March

Say cheese! John, who opted for a no tie look, hit the pavement in black dress shoes as he toted a camera in one hand

Say cheese! John, who opted for a no tie look, hit the pavement in black dress shoes as he toted a camera in one hand

He shared an Instagram picture while posing with Jimmy after the taping on Monday night. 

He also posed for a snap with fellow guest actor Don Rickles.

Jimmy also posted a picture with John and Don; he captioned it: 'Great times with these dreamboats tonight! @JohnStamos #Rickles.'

Having a laugh: John shared an Instagram picture while posing with Jimmy after the taping on Monday night

Having a laugh: John shared an Instagram picture while posing with Jimmy after the taping on Monday night

Good times: He also posed for a snap with fellow guest actor Don Rickles

Good times: He also posed for a snap with fellow guest actor Don Rickles

Smiles all around: Jimmy also posted a picture with John and Don; he captioned it: 'Great times with these dreamboats tonight! @JohnStamos #Rickles'

Smiles all around: Jimmy also posted a picture with John and Don; he captioned it: 'Great times with these dreamboats tonight! @JohnStamos #Rickles'

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