Leighton was all smiles during the outing with both Adam and a friend, sporting comfy sneakers and a soft-looking blue flannel shirt over a stretchy grey tank top. The actress' casual lunch date is the first time we've seen Leighton with a noticeable baby bump.
The Life Partners star married the 35-year-old O.C. star in February 2014. In an Ask Me Anything session on Reddit last Aug. 28, Adam surprisingly said that he wanted to have 12 kids with his wife. "And I decide," he joked.