Another mommy TMI? Hilary Duff says she keeps her newborn baby Luca's umbilical cord stump in a drawer!

"The belly button falling off ... was a big milestone," Duff told People magazine.  "And then I wanted to keep it but my husband was like, 'No, that's gross, you can't keep it!' I'm like, 'I'm totally keeping it,' and I secretly kept it."

Hilary Duff and husband welcome a baby boy

So where did the actress stash it?

"Now it's not a secret anymore. It's in a Ziploc bag in the back of my makeup drawer. Luca's going to think I'm a freak!" she says.

VIDEO: Alicia Silverstone feeds son by chewing and spitting into his mouth

Duff seems to be the latest mother to share debateable overzealous maternal behavior. Last month, a video of Alicia Silverstone pre-chewing food and then spitting it into her son's mouth went viral. 

Duff who's married to former pro hockey player Mike Comrie, gave birth to Luca Cruz Comrie on March 20.