The 28-year-old joined Rovers on trial last week following his release from Reading and has agreed terms on a two-year deal at Ewood Park.
Blackburn’s summer business has been hampered by a transfer embargo but they have now recruited French duo Fode Koita and Sacha Petshi along with Guthrie to compensate for the exits of players like Rudy Gestede, Tom Cairney and Josh King.
“It’s been a long summer, but I’m delighted to get it done and be ready and available for the first game,” Guthrie told Rovers’ official website.
“The gaffer made it quite clear that he really wanted me to join the club and felt strongly about what I could bring to the side. Every player wants to hear that from their manager and know that they’re going to be potentially an important part of the squad.
“Having said that, Blackburn is a massive club, it’s a big draw and meeting the lads and training with them, there’s some very good players.
“I’ve really enjoyed the past week. There’s a good group of lads, good staff, I’ve fitted in really well, everyone has been really good with me, I’ve really enjoyed training, obviously the facilities are top drawer, I loved playing at the stadium at the weekend – that gave me a feel for it, so all the boxes have been ticked.
“Obviously I haven’t been here for the whole pre-season, but the lads have had a good pre-season, they look fit and ready to give it a really good go this season.”
Former Liverpool trainee Guthrie spent three years with Reading having joined them from Newcastle and finished last season on loan with Fulham.