Kevin O'Leary, known as "Mr. Wonderful" on the reality television series "Shark Tank," announced on Monday that he is joining billionaire Frank McCourt in a plan to purchase TikTok.

A group including "Shark Tank" star Kevin O'Leary and Frank McCourt has submitted a bid for TikTok. They face an uphill battle to buy the app, with owner Bytedance still fighting a looming US ban.

Investor Kevin O’Leary, widely known as a star from “Shark Tank,” said he offered TikTok’s owners $20 billion in cash to buy the platform during a Friday appearance on Fox News’s ...