This will be the NHL playoff debut for the 27-year-old Hanley, who played 16 regular season games with Dallas in November and December when the team was hit hard with injuries.
"I am super excited," Hanley said. "It's an exciting time and a great opportunity. I am looking forward to it tonight. … I am just going to try to bring consistency. I am a pretty simple player. I like to get the puck to the forwards as quickly as possible, and I want to compete."
Ben Bishop, of course, gets the start in goal.
The Stars are looking to draw even in the series after a 4-3 loss in Monday's Game 3 left them down 2-1 in the series.
"We need a better effort. We talked a lot about Game 3, and we weren't good enough," said Stars defenseman Ben Lovejoy. "They came out, they outworked us, and they played a smarter game. They had a game plan; they wanted to play behind our net, and they put every puck into the corner and made us work, grind in our own zone and play defense for far too long.
"We need to turn that back on them a little bit. We need to find ways to get out of our zone quicker and play more offense and make it hard on some of their players. That's what we are going to try to do tonight."
A win tonight for the Stars and they pull even at 2-2, but a loss will leave them in a 3-1 hole with the series shifting back to St. Louis for Friday's Game 5.
"We need to be more desperate," said Montgomery. "That's the one area where, in both games that we've lost, we've played good hockey but we haven't played desperate hockey."