Sean O'Brien's long stay at Leinster will come to an end following the World Cup after he agreed to join ambitious London Irish.

London Irish pull off O'Brien coup

Leinster and Ireland back-row Sean O'Brien will join Championship leaders London Irish after the Rugby World Cup.

O'Brien has spent over a decade with the European champions, but the British and Irish Lion will link up with the Premiership hopefuls in December.

The flanker, who turns 32 on Thursday, was selected for the Lions tours of Australia and New Zealand and has won 54 caps for Six Nations champions Ireland.

O'Brien, a European Rugby Champions Cup winner on four occasions and two-time Pro14 title champion, is relishing the prospect of playing for Exiles director of rugby Declan Kidney, who handed him a first Ireland cap in 2009.

"After speaking with Declan it was obvious the ambition London Irish have as a club," he said. "I'm keen to roll up the sleeves and use my experience to help re-establish London Irish as a top club in England.

"It's a club that's been around for a long time and there's an obvious connection to Ireland with some greats of Irish rugby having previously worn the jersey. For now my concentration remains solely with Leinster and Ireland but it's an exciting challenge that awaits."

London Irish are nine points clear at the top of the second tier after being relegated last year and Kidney says the signing of O'Brien shows they mean business.

He stated: "Recruitment is an ongoing process, and we are always on the lookout for players of Sean's ability.

"Sean has proven himself time and time again to be a quality player who sets very high standards for himself and those around him, he leads by example and has a winning mentality.

"We are delighted that Sean wants to come and be a part of our journey as we move back into West London at the new Brentford Community Stadium in August 2020 after he has finished his commitments to Leinster and Ireland at the end of this year."


Beauden Barrett reaches milestone

Beauden Barrett reaches Super Rugby milestone in Canes win

The Hurricanes' second win of the Super Rugby season saw Beauden Barrett and Ben May reach personal milestones.

Folau in homophobic slur

Gay people should go to hell - Folau in homophobic slur

Rugby Australia has distanced itself from homophobic comments made by Israel Folau on social media.

Shields requests contract release

Shields requests to be released for England duty

New Zealand Rugby have not decided whether Brad Shields will be allowed to tour South Africa with England but do not plan to "muck around".

Dream come true for Tom Robertson

'Dream come true' for Robertson to earn Bledisloe Cup start

Tom Robertson described his call-up to Australia's starting XV against New Zealand in the Rugby Championship as "a dream come true".

Foley backs Barrett

Foley not convinced by reports All Blacks will drop Barrett

Beauden Barrett will start at number 10 when New Zealand take on Australia in the Rugby Championship, according to Bernard Foley.