LONDON, Oct 3 (Reuters) Romantic comedy ''Run, Fat Boy, Run'' notched up a fourth week as Britain's most popular film over the weekend, keeping Keira Knightley and ''Atonement'' off the top spot yet again.
The story of a flabby security guard signing up for a charity marathon to impress an old flame is the directorial debut of ''Friends'' star David Schwimmer and took 0.98 million pounds over the weekend, according to Screen International.
''Atonement,'' the screen version of Ian McEwan's acclaimed novel of guilt and remorse, was unchanged at No 2.
Staying in third place was ''I Now Pronounce You Chuck and Larry'', a comedy with Adam Sandler and Kevin James posing as a loving couple for insurance purposes.
At four, unchanged, was ''Superbad'' and its three schoolfriends on the trail of booze and sex.
The first of this week's newcomers was horror movie ''Halloween'' at five, the ninth incarnation of the 1978 original.
At six was George Clooney as a corporate lawyer with a conscience in ''Michael Clayton'', while ''The Brave One'' came in at seven with Jodie Foster seeking revenge on a gang of thugs.
New at eight was Billy Bob Thornton comedy ''Mr Woodcock'' while ''The Bourne Ultimatum'' was down four places in ninth spot.
Coming in at 10 was Triads versus Yakuza action movie ''War''.
Reuters SKB RN1514