Beverly Hills Hilary Duff, Mike Comrie Luca
Beverly Hills Hilary Duff, Mike Comrie Luca They've really got the co-parenting thing down!

Dressed in spandex that showcased the results of her post-baby slim down, Hilary Duff headed to a yoga session - or so she thought! - in Beverly Hills on Saturday while her husband Mike Comrie looked after their son Luca.

"Went in 4 a nice little yoga class this am... turns out I got the times backwards and was in a full cardio on burn class called ex-flosion! Oy," she tweeted about her fitness mix-up.

Earlier in the day, the married pair took their baby boy with them to a leisurely lunch, and it's nice to see that the Lizzie Maguire star is still indulging in normal meals even though she's trying to lose those last couple of pounds.

Lookin' good Hil!