LONDON — Feel-good tuner “Mamma Mia!” has become the biggest grossing Brit pic of all time at the U.K. box office.

The Meryl Streep starrer, which boasts a running cume of $109.1 million (£67 million), achieved the distinction by passing “Harry Potter and the Sorcerer’s Stone,” which took $107.6 million in the U.K.

The pic also has a very good shot at becoming the biggest grossing film of all time at U.K. wickets. It trails only James Cameron’s “Titanic,” which grossed $112.5 million.

Last weekend, the Abba musical dipped 40% to take $420,217 at 284 screens — good enough for ninth spot in the charts in its 16th session.

If it does not sink the “Titanic” on this run, future re-releases should do the trick.

This weekend, “Mamma Mia!” will have to play second fiddle to the opening of “Quantum of Solace,” which should dominate cinema biz.

“Mamma Mia!” world premiered in London June 30 and has never looked back, capturing the imagination of Brit auds. Boosted by strong reviews — “a guilty pleasure powerful enough to turn the stoniest heads,” said the Times — it opened boffo and has shown awesome traction ever since.

Maintained by strong word of mouth and, later in the run, the popularity of sing-a-long screenings, the musical has proved a positively whammo hit for Universal.

U.K. bookers attribute the sensational perf to the enduring popularity of all things Abba, auds’ appetite for feel-good fare (possibly to alleviate the misery of the depressing state of the economy), a strong maintaining campaign by Universal and the attractiveness of the British-Irish heavy cast, which includes Pierce Brosnan, Colin Firth, Julie Walters and fast-rising thesp Dominic Cooper.