January Jones Posts a Bikini Photo to Wish Her Mom a Happy Birthday

January Jones is all smiles while posing for a photo in the pool!

The 42-year-old Mad Men actress posted the photo to her Instagram account on Saturday morning (May 2).

PHOTOS: Check out the latest pics of January Jones

“Morning lap swim! Happy Birthday Mom! 💙,” she captioned the photo.

January‘s friend, actor Will Kemp, jokingly commented on the bikini pic and wrote, “I’m relieved to see you using flotation devices…” She responded and said, “oh that’s good.”

Check out the photo below!