Ahoy there! New mom Rachel Bilson shares throwback snap from when she was a baby after stepping out in chic red sunglasses 

She welcomed her first daughter with long-term boyfriend Hayden Christensen nearly nine months ago.

Rachel Bilson must have babies on her brain because she took to Instagram to share a snap of herself as a little one - dressed up in a sailor outfit - while sitting on her father's lap.

Days later the 33-year-old OC actress put on a fashionable display as she wore bright red framed sunglasses while stepping out in LA.

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Cute: Rachel Bilson shared an adorable Throwback Thursday picture of herself as a baby on her dad's knee, last week

Cute: Rachel Bilson shared an adorable Throwback Thursday picture of herself as a baby on her dad's knee, last week

Bilson captioned the shot '#tbt don't know what I'm more impressed with, my terry cloth sailor onesie or my dads overalls,' which she shared last Thursday.

The new mom was out and about to show off her slim post-pregnancy figure on Monday afternoon in Sherman Oaks, California. 

Perhaps giving a clue as to how she has snapped back into shape, the Hart Of Dixie star picked up four drinks from Juice Crafters.

Relaxed: The new mom was out and about to show off her slim post-pregnancy figure on Monday afternoon in Sherman Oaks, California

Relaxed: The new mom was out and about to show off her slim post-pregnancy figure on Monday afternoon in Sherman Oaks, California

The actress left her daughter Briar Rose in the car with her nanny as she made the smoothie run.

The star showed off her slender hips in a pair of on-trend distressed torn boyfriend jeans, which she teamed with black Nike Air Rifts. 

Creating a classic look by teaming her blue denims with a white t-shirt, Rachel added a splash of colour with red-frame shades.

Slim: Creating a classic look by teaming her blue denims with a white t-shirt, Rachel added a splash of colour with red-frame wayfarers

Slim: Creating a classic look by teaming her blue denims with a white t-shirt, Rachel added a splash of colour with red-frame wayfarers

The actress pulled the top part of her long locks into a messy top bun,  leaving the rest of her tousled style to fall casually around her shoulders. 

She met boyfriend Christensen on the set of Jumper in 2008, and they split after getting engaged in 2010. Soon after they starting dating again.

Rachel lost a lot of her fashion collection when she was burglarized by the notorious Bling Ring gang.

They reportedly targeted her several times in 2009.

Proud parents: Rachel and her long-time boyfriend Hayden welcomed their first daughter together, Briar Rose Christensen, on October 29 ; here they pictured in May 2013

Proud parents: Rachel and her long-time boyfriend Hayden welcomed their first daughter together, Briar Rose Christensen, on October 29 ; here they pictured in May 2013

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