Michael Dunlop is to take the place of injured rider John McBride in the Phase One Yamaha team.
Manx Radio TT also learned this afternoon that he will ride his own Supersport machines in the 125 and 250 events at the Billown Circuit on Saturday.
Michael, who recently lost his father, Robert, in the North West 200 in Northern Ireland, says he is delighted to step in:
TT 2026: Crowe brothers to lead out Sidecar races
Top-10 seeded teams for this year's event confirmed
Last chance to enter 2026 Parish Walk
Deadline for this year's event looming
Football: Foxdale relegated from Canada Life Men's Premier League
Three teams confirmed in Hospital Cup quarter-finals
Rugby: Douglas Celts claim Manx Cup
Ramsey scoop Manx Plate in 25/26 season finale
TT2026: McGuinness to lead out Superbike, Superstock and Senior races
Twenty-three-time winner to start out front in 30th year on mountain course