Reformed sex addict Russell Brand seems to be behaving himself these days and has been faithful to girlfriend, singer Katy Perry for weeks now.

The loved-up pair are currently staying at Russ’s North London home and spent the day frolicking in the snow on Hampstead Heath in London, even borrowing a sledge from a local child to go for a ride down the hill.

And if there’s one thing my pal Brand knows how to do, it’s how to make a girl shriek, so he must have been chuffed to bits when they flew down the hill and Californian-born babe Katy started whooping.

After finishing the ride, Russell gave the sledge back to the delighted kid before going for a romantic stroll with Katy. Could Russ’s New Year’s resolution be monogamy? Ah, it must be love!