By peoplestaff225
Updated September 11, 2009 09:00 AM
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Busy Philipps had an on-set visitor while working on her new show on Tuesday — daughter Birdie Leigh!

The baby girl, who will be 13 months old this week, and her nanny dropped in on mom while Busy, 30, was filming Cougar Town in Los Angeles.

Cougar Town, costarring Courteney Cox-Arquette, premieres September 23rd at 9:30 p.m. on ABC.