Hull FC have confirmed the signings of forward pair Sika Manu and Danny Washbrook.
New Zealand international Manu, 28, has penned a three-year contract following a spell with Penrith Panthers.
Meanwhile, 29-year-old Washbrook returns to Hull on a two-year contract after three seasons at Wakefield Trinity Wildcats.
"I've always watched Super League growing up and liked the physicality," Manu told the club's official website. "I'm looking forward to a new challenge and now I am working hard to get ready for next year and finishing this season strong with the Panthers.
"I've played with a few of the boys who will be at Hull next year before and I'm looking forward to teaming up with them again."
Hull FC continue their Super League campaign on Friday with a trip to St Helens in the Super 8s.