X17 XCLUSIVE - Katherine Heigl Hearts Her Baby Daughter Naleigh

These pix are absolutely adorable!

We just spotted TV actress turned movie star Katherine Heigl playing in a Hollywood park with her adopted daughter Naleigh this afternoon. Just look at those smiles! Who knew Kat would make a good mother?

And now that she's free from filming Grey's Anatomy - Heigl said she "couldn't sacrifice my relationship with my child" to do the show - the new mom has more time to spend with her kid. Except for all the movies she's going to make, of course.

Check out our MONSTER photo gallery of Katherine and co. below...