Don’t call Kelsey Grammer Grandpa!

His daughter Spencer Grammer — an actress on ‘Chicago P.D.’ — tells ‘Closer Weekly’ that the ‘Frasier’ star, 60, prefers to be called by his first name!

kelsey grammer and spencer grammer

Kelsey with his daughter Spencer in October 2011.

“He’s a great grandfather, but we don’t call him that,” Spencer, 31, told ‘Closer’ at the MTV Movie Awards in LA on April 12. “His father liked to be called by his first name, so we call him Kelsey.”

Related: Kelsey Grammer Talks Finding Happiness After His Sister’s Tragic Death

“My son Emmett loves him,” Spencer adds. “He’s a really big fan of ‘Toy Story 2’ and my dad is one of the voices.”

For more on all your favorite celebrities, pickup the newest issue of ‘Closer Weekly,’ on newsstands now!