
Marciello has exclusively raced Mercedes since switching to sportscars in 2017 following a race-winning stint in Formula 2, and this year was crowned champion in both the GT World Challenge Europe Endurance Cup and ADAC GT Masters series.
The Italian-born 27-year-old, who also scooped the overall GT World Challenge Europe title and won the Spa 24 Hours in a successful 2022 season, will make a one-off LMP2 appearance in High Class's Oreca 07 as the Danish outfit embarks on a second season in IMSA.