04:48 AM EDT 07/07/2014
Originally posted 03/29/2013 10:05AM
Richard Griffiths, the well-spoken, rotund presence perhaps best known for playing Muggle guardian Vernon Dursley in the Harry Potter series – and who costarred again with Daniel Radcliffe in the stage drama Equus – died Thursday from complications after heart surgery at University Hospital in Coventry, central England, his agent announced Friday. He was 65.
"Richard was by my side during two of the most important moments of my career. I was proud to know him," Radcliffe said in a statement to the BBC.
Griffiths also won a Tony in 2006 for playing slightly wayward teacher Douglas Hector in Alan Bennett's The History Boys and was the outlandish Uncle Monty in the 1987 cult movie Withnail and I.
Top 10 News Categories
The most buzzed about stars this minute!
Treat Yourself! 4 Preview Issues
More On PEOPLE.com
Got a News Tip?
Send it to our People.com editors!