Ulster have signed Australian fly-half Sam Windsor from promotion-chasing Championship side Worcester Warriors.
The 27-year-old, who is Ireland-qualified through his parents, has agreed a one-year contract and will arrive at Kingspan Stadium in July.
Windsor joined the Warriors in December on trial from New South Wales Country Eagles but dislocated a shoulder in his first match.
He played for Leinster on a short-term contract in 2013.
"Ulster presents a new challenge for me, and one I am really looking forward to," said Windsor.
"The opportunity to play in the Pro12 and the European Champions Cup excites me, and I can't wait to play in front of a packed Kingspan Stadium and the passionate Ulster supporters.
"I got a taste of Irish rugby last year while I was with Leinster, but will hopefully get a little more than that next season."
Ulster team manager Bryn Cunningham said: "Sam is an intelligent and very professional individual and it is his control of the game that we have been most impressed with.
"At 27 he has the experience to make an impact within the squad right from the off and we are fully expecting him to challenge for a starting position within the squad."
Born in Bungendore, New South Wales, Windsor joined the ACT Brumbies Academy after school.
When he narrowly missed out on a Super Rugby contract, he moved to England and spent two seasons at National One side Blackheath.
At the end of the 2012 season, he returned to Australia to play for former club Queanbeayan, before joining Leinster.