Mark Ruffalo Tells Kevin O'Leary to 'STFU' After Billie Eilish Comment

The Grammys sparked a national conversation and a feud between the actor and the Shark Tank star.

Published on Feb. 6, 2026

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Billie Eilish's acceptance speech at the Grammys, where she condemned ICE and declared 'No one is illegal on stolen land,' has sparked a national conversation - and a feud between actor Mark Ruffalo and Shark Tank's Kevin O'Leary. O'Leary criticized celebrities for injecting politics into their platforms, arguing it could alienate fans. Ruffalo fired back, telling O'Leary to 'STFU' and defending Eilish as an artist who resonates with millions.

Why it matters

This exchange highlights the growing tension between the expectation and reality of celebrity activism. As more artists use their platforms to advocate for social and political causes, there are concerns that such activism could be detrimental to a celebrity's brand and bottom line.

The details

Kevin O'Leary, known for his blunt business advice, cautioned celebrities against injecting politics into their public platforms. He argued on Fox News that taking political stances could alienate fans and impact their careers. Mark Ruffalo, a long-time outspoken critic of restrictive immigration policies, didn't mince words in his response. Taking to Threads, Ruffalo told O'Leary to 'STFU,' calling his criticism 'hilarious.' He defended Eilish as an artist who resonates with millions and accused O'Leary of upholding a 'fantasy double standard.'

  • Billie Eilish accepted the Grammy for Song of the Year on February 6, 2026.

The players

Billie Eilish

A Grammy-winning singer-songwriter who used her acceptance speech to condemn ICE and declare 'No one is illegal on stolen land.'

Mark Ruffalo

An actor and long-time outspoken critic of restrictive immigration policies who defended Eilish's comments.

Kevin O'Leary

A businessman and Shark Tank star who criticized celebrities for injecting politics into their platforms, arguing it could alienate fans.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident (San Francisco Chronicle)

“Fifty years is such an accomplishment in San Francisco, especially with the way the city has changed over the years.”

— Gordon Edgar, grocery employee (Instagram)

The takeaway

This case highlights growing concerns in the community about repeat offenders released on bail, raising questions about bail reform, public safety on SF streets, and if any special laws to govern autonomous vehicles in residential and commercial areas.