Kevin O'Leary supports his 'Marty Supreme' costar Timothée Chalamet so much, he bet $1,000 on Kalshi that he'd win an Oscar

Kevin O'Leary.

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• Kevin O'Leary bet big on Timothée Chalamet.
• O'Leary said on the red carpet that he bet $1,000 that his "Marty Supreme" costar will win an Oscar.
• Chalamet ultimately lost to Michael B. Jordan for best actor.

On Oscar night, Kevin O'Leary was confident his "Marty Supreme" costar Timothée Chalamet would walk away with the best actor Oscar.

The "Shark Tank" star was so confident, in fact, he put money on it.

O'Leary...