Michelle Williams; Peter Dinklage
Steve Granitz/WireImage; Jason LaVeris/FilmMagic
01/16/2012 AT 03:45 PM EST
Golden Globe winner
Peter Dinklage had a long-awaited reunion with his pal Michelle Williams
on the red carpet Sunday – but he didn't let her off the hook so easily.
"I sort of gave her a little grief," the proud new papa
, 42, told reporters on Sunday at the HBO afterparty in Beverly Hills.
"Everybody is very busy, but it takes [this awards show] to get together."
All jokes aside, Dinklage has nothing but love for his former Station Agent
costar, 31, who picked up a Globe for her work in My Week with Marilyn
"We became friends," he said of first meeting Williams in 2003. "She is one of my favorite actresses and she deserves everything she is getting