Sneaky Summer! Before giving birth to daughter Briar Rose earlier this fall, Rachel Bilson strategically hid her baby bump while filming the CW series Hart of Dixie — and it paid off!

The first-time mom, 33, and the show's producers found a variety of ways to cover up her growing belly in the new trailer for season four. Bilson often wore baggy clothing in her scenes, cooked behind a kitchen counter, and even stood next to a conveniently large stereo while her character Dr. Zoe Hart tried to woo (and seduce!) love interest Wade Kinsella (Wilson Bethel) with some karaoke.

Us broke news that the O.C. alum and boyfriend Hayden Christensen, 33, welcomed their first child on Oct. 29. The couple named Briar Rose after the 1959 Disney classic Sleeping Beauty, in which the three fairies call the princess by the same name while under Maleficent's dreadful curse.

Weeks before Briar's arrival, Bilson's series costar Jaime King revealed that the actress took a full maternity leave after Hart of Dixie wrapped filming. In order to work around Bilson's pregnancy, the show was given a short 10-episode order this season.

The Hart of Dixie returns on The CW on Friday, Jan. 9.

Watch the first trailer above now!