Ex-Renault Formula 1 junior driver Artem Markelov will replace the Indy 500-bound Jordan King at MP Motorsport in a one-off return to the Formula 2 championship in Monaco.
Markelov competed in F2 from 2014 - when the series was called GP2 - until the end of '18, driving for the Russian Time squad throughout that period.
He managed a best finish of second overall in 2017, where he finished runner-up to current Ferrari F1 driver Charles Leclerc.
King lies eighth in the 2019 F2 standings after making a strong return to the category so far this season after a year out, and is signed up for the season - apart from his clashing Indianapolis commitment next weekend.
Nine-time GP2 and F2 race winner Markelov has confirmed that his return to the F1 support category is a one-off, as he is focused on his Super Formula campaign.
He is competing in that championship at Autopolis this weekend, having finished 10th in the Super Formula season opener at Suzuka.
"I am very happy to join MP Motorsport in Monaco," said Markelov.
"Monaco is a special place, and I can't think of a better occasion for a one-off return to Formula 2.
"I'm looking forward to meeting lots of old friends, and of course wish Jordan all the best in his effort to win the Indy 500!"
MP team boss Sander Dorsman added: "We can't think of a quicker man to step into Jordan's car at Monaco than Artem.
"We are sorry to lose Jordan for the weekend, but Artem is a worthy replacement.
"I look forward to working with him during an important weekend for us and hope that he will help us to a pair of great results at Monaco."