Jann Mardenborough is set to make his GP2 debut this weekend at Monza, stepping in for Sean Gelael who has commitment clashes in the Formula Renault 3.5 Series at Silverstone.

The Nissan NISMO academy driver has been promoted by Carlin from his regular GP3 slot into the British team's GP2 efforts and will team-mate Julian Leal at Monza.

The Welshman has had a season of contrasting fortunes in GP3 this year. After three consecutive top five finishes at the start of 2015 - highlight by a podium in the sprint race at Barcelona - he has failed to finish in the points in the past seven races.

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Mardenborough, who started his single-seater racing career in 2013 after winning the 2011 Nissan PlayStation GT Academy, will get his maiden outing in GP2 machinery this weekend and is looking forward to gaining as much as he can from the experience.

"Firstly I'm extremely excited to drive a GP2 car for the first time, it's an opportunity that I couldn't turn down," Mardenborough said. "I want to move up to GP2 in the future so to have this experience now is very valuable.

"I want to be competitive but the challenges in GP2 are very different to GP3; with DRS and two tyres compounds, as well as longer races and pit stops, although I'm used to those from sports car racing. It's going to be a big step up but I'm going to give it everything."

Team boss Trevor Carlin says with Gelael absent in FR3.5 it became an ideal opportunity to give Mardenborough an early chance to impress in a GP2 car.

"Jann is a very talented and fast driver and has suffered some bad luck this season which means he hasn't claimed the results he's capable of," Carlin added. "Although this will be a big learning curve for him, we're pleased to give one of our GP3 drivers the opportunity to step up to the next level."

The 23-year-old has some experience of racing at Monza having competed there in 2013 while in European Formula 3 championship with Carlin and in 2014 in his rookie GP3 season with Arden International.

Carlin has also confirmed Mardenborough's GP3 race seat will be left vacant until he returns for the next round at Sochi in October.