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Former Australia captain James Horwill has come out of retirement and is set to play for Cambridge University in December's Varsity game against Oxford.

The ex-Harlequins lock, 34, retired this summer and is doing a masters at the Cambridge business school.

Horwill's fellow Wallabies lock Dan Vickerman and old Quins team-mate Jamie Roberts have also played for Cambridge.

"I speak to Jamie quite regularly and he certainly was a big influence in it," Horwill told 91�ȱ� Cambridgeshire.

"I must admit he probably planted the seed quite early. I'd been up here a couple times with him when he was involved, and been around a couple events up at Cambridge."

As recently as June, Horwill skippered a Barbarians side - and scored a try - as they narrowly lost to an England XV at Twickenham, where the Varsity match will be held on 12 December.

Cambridge lost 38-16 in last year's game, officiated by former World Cup final referee Nigel Owens.

"I think it's going to be a challenge, there's no doubt about that, but I think that was part of the reason I wanted to do it, to push myself in a different way," added Horwill.