Lovegrove, 25, was out of contract at the end of the season, and has now signed a deal to take him through to his ninth year with the Robins.
He said: “I always wanted to stay here. There were one or two other options but nothing really serious and the only talking I was doing was with Hull KR. It’s great to get it all sorted out and the new contract takes me a long way towards my goal of being a one-club player.
“I’ve had a few chats with Sandy (Craig Sandercock) about the plans he has here and I want to be a part of that over the next few seasons. I started at square one when I first came over as it was our first year in the Super League and the club has really grown since then. I’m excited about the future and glad to be staying here.”
Sydney-born Lovegrove joined the club from St George-Illawarra Dragons, making his debut against Hull in 2007.