First Photos Of New Mom Leighton Meester & Baby Daughter Arlo
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/YElfCnE3r/480x251/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 480w, https://media.radaronline.com/brand-img/YElfCnE3r/640x335/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 640w, https://media.radaronline.com/brand-img/YElfCnE3r/768x402/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 768w, https://media.radaronline.com/brand-img/YElfCnE3r/1024x536/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 1024w, https://media.radaronline.com/brand-img/YElfCnE3r/1280x670/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 1280w, https://media.radaronline.com/brand-img/YElfCnE3r/1440x753/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 1440w, https://media.radaronline.com/brand-img/YElfCnE3r/1600x837/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 1600w, https://media.radaronline.com/brand-img/YElfCnE3r/2160x1130/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg?position=top 2160w)
Dec. 23 2015, Published 4:12 p.m. ET
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/uVoN3-Xt7/480x300/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 480w, https://media.radaronline.com/brand-img/uVoN3-Xt7/640x400/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 640w, https://media.radaronline.com/brand-img/uVoN3-Xt7/768x480/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 768w, https://media.radaronline.com/brand-img/uVoN3-Xt7/1024x640/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 1024w, https://media.radaronline.com/brand-img/uVoN3-Xt7/1280x800/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 1280w, https://media.radaronline.com/brand-img/uVoN3-Xt7/1440x900/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 1440w, https://media.radaronline.com/brand-img/uVoN3-Xt7/1600x1000/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 1600w, https://media.radaronline.com/brand-img/uVoN3-Xt7/2160x1350/2015/12/leighton-meester-post-baby-body-daughter-first-sighting.jpg 2160w)
Leighton Meester's baby has made her debut! The Gossip Girl actress, joined by husband Adam Brody, doted on her daughter during a hike in Los Angeles — see her post-baby bod!
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/JeaWX64mp/375x500/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-01.jpg 375w)
Leighton Meester is looking good!
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/Mwn1wDV11/486x500/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-02.jpg 486w)
The new mom, 29, flaunted her post-baby body while hiking with husband Adam Brody, 36, and their daughter Arlo Day.
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/GFQSZQgv8/424x500/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-03.jpg 424w)
The four-month-old was strapped to her daddy's chest for the nearly two-hour long hike.
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/_xudvzwad/290x500/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-04.jpg 290w)
The Gossip Girl star proved she's already back in shape, keeping up the pace in a casual flannel and sweats.
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/jeOq_ey61/331x499/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-05.jpg 331w)
The couple sported matching red outfits — how appropriate for the holiday season!
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/eNKZpllvF/365x500/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-06.jpg 365w)
Meanwhile, former costar Blake Lively recently had a baby as well, though sources say the TV BFFs no longer speak to one another.
![Leighton Meester Post Baby Body Daughter First Sighting](https://media.radaronline.com/brand-img/L5mSx9lZs/354x500/2015/12/leighton-meester-post-baby-body-daughter-first-sighting-07.jpg 354w)
What do you think of Leighton's post-baby bod? Let us know in the comments below!