London, UK - British actor Paul Ritter has died of a brain tumor. He was 54.

Ritter passed away at his home on Monday with his wife Polly and sons Frank and Noah by his side, according to the Guardian.

The actor was best known for starring as the wizard Eldred Worple in Harry Potter and the Half-Blood Prince (2009) and as James Bond antagonist Guy Haines in Quantum of Solace (2008).

His greatest success in the UK came with his portrayal of the family's patriarch Martin Goodman in the British comedy series Friday Night Dinner (2011-2020).

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In 2019, Ritter was showered with praise for his role as Anatoly Dyatlov in the award winning movie Chernobyl.

Robert Popper, the sitcom's creator tweeted that he was "devastated" at the news of Ritter's passing.

"Paul was a lovely, wonderful human being. Kind, funny, super caring and the greatest actor I ever worked with x," he continued.

"Paul was an exceptionally talented actor playing an enormous variety of roles on stage and screen with extraordinary skill. He was fiercely intelligent, kind and very funny. We will miss him greatly," his agent said in tribute.