QPR have made striker Jay Emmanuel-Thomas their third signing of the summer on a three-year deal.
Emmanuel-Thomas helped Bristol City to promotion from League One last season, scoring 12 goals in all competitions, but was not offered a new deal by the Robins.
Coach Chris Ramsey told the club's official website: "I've always admired Jay from afar and I'm really delighted we've reached an agreement to bring him here.
"There was a lot of hype surrounding him when he was a young player at Arsenal, and although he's had a very steady career since then, this is now a real opportunity for him to really kick on at QPR.
"We'll give him the platform to play and express himself. He's got flair, he's a good runner with the ball and he's got great versatility.
"He is already a very good player, but his potential to keep improving is fantastic."
The 24-year-old joins Massimo Luongo and Ben Gladwin at Loftus Road.