The pair combined to clinch a dramatic last-gasp 23-22 win with Hibbard going over three minutes from time and fly-half Biggar’s conversion striking a post before landing the right side of the upright.

The victory means the Ospreys leapfrog Munster into second in the Pro12 after recovering from consecutive defeats to Ulster and Glasgow Warriors to get their play-off push back on track.

Leinsterlooked to be on their way to a routine victory leading 16-6 at the break thanks to Ian Madigan’s try and 11 points from the boot of centre Fergus McFadden.

But the Ospreys hit back soon after the restart with George Stowers going over before Justin Tipuric, who filled in for skipper Sam Warburton during the Six Nations, was sinbinned to reduce them to 14 men.

The Ospreys held out though and stunned their opponents when Hibbard bulldozed his way through a series of tackles to touch down in the 77^th minute and Biggar did the rest to take his own tally to 13 points.

The Ospreys welcomed back Grand Slam winners Alun Wyn Jones, Ryan Jones and Tipuric, and Hibbard and Biggar will be aiming to join the trio in the summer tour to Australia for a three-test series.

Elsewhere fourth-placed Glasgow narrowly missed out on a valuable bonus point in their quest for a play-off place after recording an impressive 29-6 victory over Aironi.

The Italian side could only muster two Luciano Orquera penalties in response to tries from Tommy Seymour, Ryan Grant and Peter Murchie for the hosts with Duncan Weir kicking 14 points.

In Friday’s other game Newport Gwent Dragons ran out 29-15 winners over Edinburgh as Michael Bradley’s men made it no wins from six fixtures against Welsh sides this season.

Two early tries from right wing Tonderai Chavhanga set the Dragons on their way to a 29-15 win as the Welsh side completed a league double over Edinburgh.

Steffan Jones added the extras and three penalties before his replacement Lewis Robling notched another pair.

Harry Leonard’s five penalties gave Edinburgh some consolation but couldn’t stop the Dragons picking up an away win.