Caligula marks the first time that actor Michael Sheen, who plays the title role, and Donmar artistic director Michael Grandage have worked together, but it's unlikely to be the last. At the post-show Q&A as part of last week's Whatsonstage.com Outing to the Camus revival, Sheen revealed that the production with Grandage had been the most rewarding experience he's had to date with a theatre director, and the two said they hope to collaborate again in future. But what could Sheen do for a follow-up? With Caligula, he completes his list of most coveted stage roles, which have also included Jimmy Porter in Look Back in Anger, Konstantin in The Seagull, Romeo and Peer Gynt (See 20 Questions, 28 Apr 2003). The actor says he wants to be back on stage again next year, but that, whatever the part, it most match the same kind of epic scale. One Whatsonstage.com member suggested a musical might stretch the skills of the classical actor, who in one of Caligula's lighter moments, prove he can at least do a jig. Grandage - whose single musical to date, the Donmar's 2000 revival of Sondheim's Merrily We Roll Along, was a multiple Olivier and Whatsonstage.com Award-winner - could, no doubt, help him rise to the challenge.