Blake Lively's Lucky Charm: Penny!

It’s cold out here for a pup! keeps Penny all bundled up inside her coat during a chilly day of shooting Gossip Girl.

Penny doesn’t sleep on just anything! Lively totes a plush pink blanket for when her pooch gets sleepy.

Look ma, no hands! Lively easily one-arms Penny, who she’s described as a “glorified mouse”, during a day of errands.

For a glam night out, Penny keeps it simply chic with her own fur coat.

Penny perches atop Lively during a gab session with Gossip Girl costar . Maybe next time, Meester’s pup Trudy can join in!

The Green Lantern starlet keeps full with a banana, hydrated with a coffee and company with “pretty precious” Penny.

Mom’s not the only style star! Lively poses with her pup in Glamour’s July issue, telling the mag, “It doesn’t get old. She’s perpetually a puppy, and every time I see her, it’s the first time I saw her.”

It’s sweater weather for Penny, who matches her mom in some dark winter-wear of her own.