Larry Kudlow, the National Economic Council director, has been hospitalized after suffering a heart attack, President Trump said Tuesday from Singapore.

"Our Great Larry Kudlow, who has been working so hard on trade and the economy, has just suffered a heart attack," Trump tweeted ahead of his historic summit with North Korean leader Kim Jong Un. "He is now in Walter Reed Medical Center."

Kudlow, 70, a conservative commentator, had replaced Gary Cohn who resigned in March.

“Earlier today National Economic Council Director and Assistant to the President Larry Kudlow, experienced what his doctors say, was a very mild heart attack," White House press secretary Sarah Sanders said in a statement.

"Larry is currently in good condition at Walter Reed National Military Medical Center and his doctors expect he will make a full and speedy recovery," Sanders continued. "The President and his Administration send their thoughts and prayers to Larry and his family."

Kudlow has long been known as a respected business and economics commentator, getting his own CNBC show in 2011. Since then, he’s hosted a variety of shows on the network, including “The Kudlow Report” and “Kudlow & Cramer.”

He also served as associate director for economics and planning in the Office of Management and Budget (OMB) during the Reagan administration. A former chief economist for a Wall Street firm, Kudlow battled addiction and took time off from Bear Stearns for a stint in drug rehab.

His commitment to Alcoholics Anonymous meetings reportedly was a contributing factor in why he ultimately ruled out a Connecticut Senate bid in 2016.

In recent days he has been a vocal critic of Canadian Prime Minister Justin Trudeau and his interactions with Trump during the G7 summit following a debate between the two leaders over tariffs.

He called Trudeau's post-summit press conference, in which he said Canada wouldn't be “pushed around” by the U.S. after Trump had already left the meeting, a “sophomoric, political stunt for domestic consumption.

“Karen and I are praying for our dear friend @Larry_Kudlow tonight,” Vice President Mike Pence tweeted in reply to the president's announcement.

Fox News' Kaitlyn Schallhorn contributed to this report.