Trump personally called Barr to offer his congratulations after her eponymous family sitcom pulled in a whopping 18.2 million viewers on Tuesday night.
The president spoke to the comedian about the premiere's 'huge' ratings, and thanked Barr for her continued public support, according to the New York Times.
He also reportedly thanked Barr, 65, for making her character in the show a passionate Trump supporter.
The call was confirmed by White House Press Secretary Sarah Huckabee Sanders.
It is hardly a surprise that Roseanne, which follows blue-collar family the Connors and stars the comedian as a Trump fan, hit big with Middle America.
The show performed best in states that Trump easily won in 2016, while Americans in the left-leaning coastal states hardly tuned in at all.
Roseanne's highest ratings were in Tulsa, Oklahoma, which Trump won easily in 2016 with 65.3 percent of the vote, according to Deadline.
Rounding out the top three were Cincinnati, Ohio and Kansas City, Missouri.