December 17, 2011 01:00 PM

INF

Grab and go!

A beaming Ali Larter can’t keep her eyes off adorable son Theodore Hayes — who turns 1 on Dec. 20! — while out and about on Friday in Los Angeles.

“We’re doing a big one on the actual day in Chicago where my husband [Hayes MacArthur]‘s family is, and we’ll do a mini one with my family,” the actress, 35, tells PEOPLE of the parties she has planned for her son.

“He’s so musically inclined, I think we’ll do something with lots of drums, tambourines and guitar.”

RELATED: Ali Larter Planning ‘Something Jammin” for Teddy’s Birthday

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