Midfielder Elliot Watt "wants to put smiles on fans' faces" after joining St Johnstone on loan from Burton Albion until the end of the season.
The former Scotland Under-21 international joined the League One side last summer from Salford City and has made 30 appearances this season.
The 24-year-old is "delighted" to move to McDiarmid Park following a "positive" chat with manager Simo Valakari.
"It's been a bit of a whirlwind 24 hours," he told the club website. "I'm now just looking forward to getting into training with the boys and cracking on.
"The head coach explained where he saw me in the system and what I could bring to the club. It was a really positive conversation and, from that point, I wanted to get up here.
"Hopefully the fans can travel in their numbers this Saturday and can get right behind us. I'm looking forward to showing what I can do."