Boscoe Barles, the star of the play.

Give him a big round of ap-paws.

A rescue-pup-turned-thespian named Boscoe ­Barles starred in a one-dog show in Brooklyn Saturday — bow-wowing the sold-out audience with his fetching performance.

“He’s the Emma Stone of dog actors … He’s a natural,” gushed the Shih Tzu’s owner, Charles Quittner, a 27-year-old theater director.

Quittner organized the Boscoe Barles “Bestival” at The Brick Theater in Williamsburg to celebrate his dog’s one-year adoption anniversary, and to raise funds for the shelter he came from.

The canine star showed off his acting chops in a series of five short plays — starring as himself, the mayor of a small town and an emotional-support chinchilla.

Human supporting actors carried treats in their pockets to keep Boscoe on track, but the performing pup still went off-script at times.

As a chinchilla, Boscoe improvised and began digging into a prop therapist couch — earning howls of laughter from the crowd.

In between scenes, the tiny star also plunked himself down on the laps of various audience members.

It wasn’t Boscoe’s first time taking center stage.

The seasoned entertainer, who hails from Texas, made his debut just two days after being adopted by Quittner — playing a Roman senator in an adaptation of Shakespeare’s “Coriolanus.”

Since then, he has performed in a handful of plays and “loves the attention,” Quittner said.

“He lives for the applause,” he said. “Lady Gaga is his idol.”

Asked if Boscoe has any diva demands, one production assistant quipped, “He doesn’t sign autographs.”

But the pup, clad in a bow tie, did mingle with the audience before the matinee.

“The star?! He’s here? Can I meet him?” one woman gasped.

The show raised more than $600 for BARC, Boscoe’s old shelter, and Quittner vowed to make it “1 million percent an annual thing.”

Quittner posted photos of other dogs currently up for adoption at the shelter on the walls of the theater.

“They could be stars, too,” he said.