Douvan has not run since suffering a shock defeat in last year's Champion Chase, in which he picked up an injury, while Faugheen was last seen finishing second to Supasundae in the Irish Champion Hurdle at Leopardstown.
Speaking after riding a winner at Thurles, Mullins' son and assistant Patrick said: "Douvan and Faugheen are both in great form and both worked great this morning and it's all systems go.
Mullins also had news of Hollowgraphic, who was a notable absentee from the confirmations for the Weatherbys Champion Bumper.
He said: "Hollowgraphic was doing a bit of work and pulled a muscle, so it was bad timing and not a long-term thing. I've no idea what I might ride in the race yet."
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