President-elect Donald Trump has nominated investment banker Warren Stephens to be his ambassador to the United Kingdom.

Stephens, a financial backer of Trump’s campaign, would be among at least five other billionaires selected for major roles by the president-elect.

“Warren has always dreamed of serving the United States full time,” Trump said Monday in a Truth Social post. “I am thrilled that he will now have that opportunity as the top Diplomat, representing the U.S.A. to one of America’s most cherished and beloved Allies.”

Stephens donated $1 million to Trump’s campaign over the summer after supporting other Republican presidential candidates, including former New Jersey Gov. Chris Christie and South Carolina Sen. Tim Scott.

In 2016, Stephens gave a combined $5.9 million to a pair of super PACs that spent heavily to prevent Trump from winning the Republican nomination.