John Slattery: January Jones is a Sweetheart!

January Jones heads to a yoga class on Tuesday (August 23) in Los Angeles.

The 33-year-old Mad Men actress covered her baby bump in a three-quarter sleeved burnout tee. January is expecting her first child in the fall!

PHOTOS: Check out the latest pics of January Jones

January‘s former onscreen son, 11-year-old Jared Gilmore, recently dished that January wasn’t “as approachable as the others [on the Mad Men set],” but John Slattery told E! that while he can understand where Jared‘s coming from, she’s actually a sweetheart!

“Well, it’s an intimidating character,” John said. “I mean, that’s the character. Betty Draper is an intimidating woman, I suppose, if you were a seven-year-old boy [or] her son.”