Zach Galifianakis may zing celebrities with some not-so-nice questions and inappropriate observations on his Funny or Die talk show “Between Two Ferns,” but he thinks he goes too far sometimes.

Case in point — Galifianakis called Bradley Cooper recently to apologize after taking a shot at him in the new full-length feature “Between Two Ferns: The Movie.”

“He’s not even in the movie, but I refer to him as a ‘hot idiot,’?” Galifianakis said at the film’s premiere Monday in Hollywood. “I called him when I saw the trailer. … I was like, ‘I called you a ‘hot idiot.’?”

Fortunately, Cooper just laughed, Galifianakis said. “He doesn’t care. He’s good-natured that way.”

He added with a laugh, “I don’t want to hurt people, but I do want to make them feel weird. There’s a fine line there.”

Galifianakis had been thinking about expanding the “Between Two Ferns” brand for some time now.

“I like doing these but to take a sketch and blow it up into an hour and a half narrative, it’s risky,” he said.

In fact, producers hadn’t booked any of the celebrity guests before they started shooting the movie.

“We just started filming things,” he said. “Once we got some guests, people switched their schedules, storylines changed because we were writing on the fly. ... In the end, it was so much fun to do.”

The star-studded guest list includes Matthew McConaughey, Jon Hamm, Chrissy Teigen, Keanu Reeves, Hailee Steinfeld, Tessa Thompson, Benedict Cumberbatch and Tiffany Haddish.

The movie begins streaming Friday on Netflix.

— Variety