Hollywood actor James Franco has fallen sick on the press tour for his new movie Oz The Great And Powerful.

The Spider-Man star has been on the road promoting the fantasy film with his castmates Mila Kunis, Michelle Williams and Rachel Weisz, and he appeared to be suffering from a sniffle at the European premiere in London on Thursday night (28Feb13).

It has now emerged the actor was too sick to attend a taping of a British talk show on Thursday and cancelled the promotional appearance, leaving co-star Kunis to continue without him.

The Black Swan star was asked about Franco's health during her interview on The Graham Norton Show, and she assured fans the actor is "fine".

The show airs in the U.K. on Friday (01Mar13).