Rob Butler has signed a one-year deal with newly promoted London Broncos.
The 25-year-old prop made his professional debut for the club in 2018 before spells with Warrington and Wakefield.
Butler returned to London in June, making 17 appearances and helping Broncos overcome Toulouse in last month's Million Pound Game.
"I'm really excited to be back home where it all started, and back in Super League," he said.
Broncos secured their return to Super League with an 18-14 win against Toulouse Olympique in the Championship Grand Final in October.
Butler told the club website: "We finished the season strong and hopefully we can take that into this next season - and to be a part that all is great."
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