No “A for effort” here!

While some stars went all out for their Halloween costumes, others didn’t even try. Case in point: January Jones.

The “Mad Men” star did at least dressed up for Halloween as… wait for it … Betty Draper.

That’s right, the 35-year-old actress went as the character she’s played for the past six seasons on the hit AMC drama.

The star was snapped watching her son, Xander, trick-or-treat with his nanny near her Los Angeles home.

Give Jones some credit, though, she’s got Betty’s icy look of disapproval down pat.