Katherine Heigl shares hilarious exercise selfie

Katherine Heigl is "back on the exercise train" after welcoming her son Joshua Bishop Kelley Jr.

The actress took to Instagram to share a funny photo walking her newborn, wearing a jumper with her own face on it.

"1st day back on the exercise train postpartum and I'm feeling fine! And yes I am wearing a sweatshirt with my own face on it...," the 38-year-old wrote.

"Only sweatshirt I had that was warm enough for Utah...then of course there's the fanny pack...and the ol' Miss ski hat...I mean the whole outfit's pretty badass...😳😜😂"

1st day back on the exercise train postpartum and I'm feeling fine! And yes I am wearing a sweatshirt with my own face on it...only sweatshirt I had that was warm enough for Utah...then of course there's the fanny pack...and the ol' Miss ski hat...I mean the whole outfit's pretty badass...😳😜😂

Heigl and her husband, musician Josh Kelley, welcomed baby Joshua on December 20.

@joshbkelley caught me soaking up some morning baby love...❤️❤️❤️❤️

@joshbkelley and I are beyond thrilled to finally share the arrival of our little man Joshua Bishop Kelley Jr born December 20th, weighing in at 7 pounds 15 ounces. We are all happy, healthy and beyond grateful! For more pics and the exclusive story check out @people magazine (out Friday) who I must profusely thank for helping us to announce our happy news in a beautiful, honest and loving way! I also want to give a big hearty loving shoutout to my bestie @cheyenneellis for the gorgeous photos including this one! And one more GIANT thank you to all of you for your wonderful words of support, love and all those beautiful well wishes! As always I am incredibly grateful to have such wonderful fans! ❤️❤️❤️❤️❤️❤️