"I feel good. I'm going to be ready. I think I'm in and I'm ready to go," Horton said after taking part in Saturday's morning skate at United Center. He did rushes with linemates Milan Lucic and David Krejci.
Coach Claude Julien confirmed Horton would be in the lineup.
"There's absolutely no reason he shouldn't play tonight," Julien said.
Horton left Game 1 against the Chicago Blackhawks with an upper-body injury but was not worried about it keeping him out of Game 2.
"There's no fear at all," Horton said. "I knew I was going to play. I feel good, I'm ready. It's good to be back in it."
Horton has seven goals and 11 assists in these playoffs. Having him on the ice keeps the Bruins' top line in tact and changes the complexion of how the Blackhawks must defend Boston.
"You watch him play the another night and you say it's not a fluke," Chicago coach Joel Quenneville said. "That line has been very effective and efficient. We'll see. I know that line certainly gave us something to be concerned with from the start of that game and ongoing."
Jaromir Jagr was the only Bruins player who did not take part in the morning skate.
"He's a hundred per cent," Julien said. "He's 41."
Everyone was present for the Blackhawks, who will have the same Game 2 lineup as they did Wednesday in their triple-overtime victory.