Rachel Bilson donned a whimsical-looking pastel and floral dress that screamed youthfulness and playfulness, and could have even been hiding a baby bump, at the Chanel NRDC "A Celebration of Art, Nature and Technology" Celebration Dinner at a private Los Angeles residence on May 31. 

The 31-year-old sweet-faced "Hart of Dixie" actress wore the loose-fitted, strapless Chanel garment, paired with rosy, fuller cheeks, which could indicate a bundle of joy on the way, according to Joblo.  

Whether or not she is with child, the star was in good company alongside Emma Roberts, Tobey Maguire and Cindy Crawford.

The on-again girlfriend of Hayden Christensen posed for snaps, and apparently, is still at a good age for child-bearing, Joblo reported. 

She also had a pregnancy-like glow. Bilson had a particular shine that read "blushing babe," with "dewy, rosy blush" and a "loose, wispy updo," according to Perez Hilton.

Aside from the baby rumors, the actress finished the fairy tale-feeling look with a ShoeMint Silva shoes in silver, according to Celebuzz. And she kept the accessories to a minimum to let her dress steal the show.

For the photos of her in a perfect-for-summer dress, click HERE.