Donald Trump hasn't always been so fond of Mitt Romney.
Before he endorsed him for the GOP presidential nomination, the real estate mogul and 'Celebrity Apprentice' host used to get a kick out of trashing Romney on national TV every chance he got.
"I wasn't in love with the job he did in Massachusetts," Trump told Greta Van Susteren of Fox News in August. "He wasn't popular. He was a one-term governor...[and] the Romneycare was obviously not a good situation."
Trump also famously called Romney a "small business guy" on CNN's 'State of the Union.' "He walked away with some money from a very good company that he didn't create," Trump said. "My net worth is many, many, many times Mitt Romney," he continued.
We've compiled the most scathing things Trump has said about Mitt Romney leading up to his endorsement on Thursday. Click the video above to watch.