IndyCar race winner Justin Wilson will race in the Sebring 12 Hours later this month in the Michael Shank Racing Ligier JS P2.
He replaces Matt McMurry and lines up alongside Oswaldo Negri and John Pew.
McMurry, who became the youngest ever participant in the Le Mans 24 Hours last year with Greaves Motorsport, will instead race in IMSA Prototype Lites with JDC Motorsports.
Wilson, 36, raced for MSR in last year's Sebring 12 Hours, finishing ninth in a Riley-Ford. Wilson also raced in the event earlier in his career, making his debut with the Ascari SR1 car in 2002 while he was still a rookie F1 test driver. He finished in sixth place on his first visit to Florida.
Motorsport.com had last month followed up rumors of McMurry leaving the MSR LMP2 line-up but the team said he was still an important part of it.
The 17-year-old was slated to contest the whole 2015 Tequila Patron North American Endurance Cup in the MSR Ligier.
It remains to be seen if Wilson will race in IndyCar at all this season after three consecutive years with Dale Coyne Racing.