CREDIT: CSPAN screengrab. Silverman (right) on stage at the DNC with Sen. Al Franken (D-MN).

Not so long ago, Sarah Silverman was a big Bernie Sanders supporter. But after Hillary Clinton prevailed in the primary, the comedian is now throwing her support behind the presumptive Democratic nominee, and some Sanders supporters don’t like it.

During the first night of the Democratic National Convention, Silverman explained why she will “vote for Hillary with gusto” while still being “proud to be part of Bernie’s movement.”

“Bernie’s already succeeded in so many ways,” she said. “He proved that Citizens United is in fact not a necessary evil… And I’m very glad that Hillary has vowed to overturn it. Not only did Bernie wake us up, he made us understand what is possible and what we deserve.”

But Silverman went on to acknowledge the reality that many Bernie supporters seemed loath to acknowledge on Monday — Clinton won the primary and is the party’s presumptive nominee.

“Hillary heard the passion of the people, the people behind Bernie and brought those passions into the party’s platform, and that is the process of democracy at its very best and it’s very cool to see,” Silverman continued. “Hillary is the Democratic nominee and I will proudly vote for her.”

Those comments didn’t sit well with some Sanders supporters in the audience, some of whom broke into chants of “Ber-nie! Ber-nie! Ber-nie!” Eventually, Silverman had enough.

“Can I just say, to the Bernie or bust people, you are being ridiculous,” she said.

Earlier on Monday, Bernie Sanders’ own delegates booed him for endorsing Clinton. Hours later, Sanders supporters drowned out Democratic National Convention platform chair Elijah Cummings (D-MD) as he spoke in the opening minutes of the DNC. Before the convention began, Sanders sent his supporters a text asking them “as a personal courtesy to me to not engage in any kind of protest on the floor. It’s of utmost important you explain this to your delegates.”