The Italian centre-half has agreed a deal to play at Loftus Road in 2015-16.
QPR FC (@QPRFC) September 1, 2015
The former Italy under-21 international has fallen down the pecking order at Vicarage Road after playing a crucial role in helping the Hornets get promoted from the Championship to the Premier League last season.
Angella played 32 times last term for Watford but has not featured for the newly promoted side in the top flight.
The 26-year-old has been on the Hornets’ books for two seasons, playing 75 league fixtures and chipping in with a vital nine goals over the last 24 months.
QPR will hope to follow Watford’s example and gain promotion back to the top flight this term and will be confident that the former Udinese, Siena and Reggina man can play a role in helping their drive for a top-two finish.
The Loftus Road outfit lost talismanic defender Steven Caulker to Southampton on a loan deal this summer, and as such will be keen to bring someone of Angella’s experience into their squad.
The Florence-born enforcer has stated that he is relieved to have secured a deadline day move and is looking forward to a new challenge in his career and to showing the QPR fans just what he is capable of.
“I am very happy for this big opportunity,” Angella told the QPR official website.
“I am happy to be at this great club with big history.
“I've played for two years in England and enjoyed every minute. It’s a great place to play.
“I want to help the club this season and do my best here - this is a new page in the book of my career. I just want to play and improve and show the fans what I can do.”