The former Grey's Anatomy actress, who adopted the baby girl in 2009 with husband Josh Kelley, revealed that Naleigh loves wearing high heels and is growing up quickly.
"I had my stylist over and we were working on my outfit tonight, and we had a slew of beautiful shoes, jewellery and clothes. Naleigh loves clothes," Heigl recalled in an interview with US Weekly.
"She's a total girly girl, and she put on these crazy stiletto shoes and could walk in them! She's three years old and her foot is this big, but she could, like, walk around in these stilettos that I think are impossible to walk in."
Heigl also revealed that the toddler loves to talk and has lately developed "this whole attitude" which she sometimes finds difficult to deal with.
"Not a bad attitude. But like a very grown-up, saucy attitude that blows my mind. I don't know where she's picking it up, and I hope it's not from me! That would be very upsetting," she said.
Heigl previously revealed that she struggles to find balance between being a good mother and a good actress and finds it "impossible" to do both.
> Josh Kelley: 'We'll give Naleigh sibling'
Watch a trailer for Katherine Heigl's forthcoming film New Year's Eve below: