Trainer Paul Nicholls has confirmed that Azertyuiop will run in Sunday's Stan James King George VI Chase at Kempton.
The champion two-mile chaser will step up in trip to tackle the St Stephen's Day feature rather than wait for the Castleford Chase at Wetherby a day later.
The seven-year-old will be attempting three miles for the first time and he will be partnered by star Irish jockey Ruby Walsh.
Walsh had initially been due to partner Le Roi Miguel in the Grade One showpiece but fellow Irishman Paul Carberry now comes in for the ride.
"The decision to ride Azertyiuop was down to Ruby. I was under the impression he would ride Le Roi Miguel but Andy Stewart (Le Roi Miguel's owner) has sportingly agreed to allow Ruby to ride the champion chaser," Nicholls said.