Stars & Their Pets: Hilary's Book Buddy

Think he knows how to read? Duff meets a four-legged fan on Friday while promoting her new book, Elixir, at a signing in Miami.

Following a sexy sushi date with beau Joe Jonas, Greene gets back into work mode on Sunday, arriving at Los Angeles International Airport with pooch Marlo before flying to the Twilight set in Louisiana.

Also at LAX: Greene’s costar Reed, who calms rescue pup Sydney before take-off on Sunday.

Hello there! Schreiber and partner Naomi Watts make dog-walking a family affair, strolling through New York City with Yorkie Bob and sons Sasha, 3, and Kai, 21 months, on Saturday.

It’s business as usual for Seyfried and Finn, who enjoy a relaxing walk around Beverly Hills on Saturday.

Tyler bundles up for a brisk walk with King Charles spaniel Neal on Sunday in New York’s West Village.

The Defenders star and his fit pooch assume a familiar position, running around their Calabasas, Calif., neighborhood on Saturday.

Three’s company! The actress lets dog Oliver crash her date, bringing him to lunch with boyfriend Steve Pate in Calabasas, Calif., on Saturday.

Barton spends some quality time with pups Charlie and Ziggy on Thursday at Pup-Peroni’s Couch Talk event in Encino, Calif., where the actress received advice on communicating with her dogs non-verbally.