Kelsey Grammer Parties at Playboy Mansion With Baby Faith

10/29/2012 7:00 AM PDT

Kelsey Grammer Parties At Playboy Mansion with Baby Faith


You're never too young to party in Hollywood ... so says Kelsey Grammer, who took his 3-month-old baby to the Playboy Mansion for a Halloween bash and partied 'til the wee hours of the morning.

A party-goer tells us ... Kelsey was whooping it up at a table next to Paris Hilton just after midnight.  Baby Faith was tucked into her bassinet as the music blared.

A Playboy Playmate with curious maternal instincts tweeted, "Why the fk does Kelsey Grammer have a newborn baby at the Mansion party!?!?!?"

We called Kelsey's rep, so far no comment.