Sir Ian and Lily were appearing as guests on the Jonathan Ross Show Christmas Special when the host presented the pair with an insect-based feast of sago worms, black ants, locusts, grasshoppers and mealworm hummus.

The Lord of the Rings star tucked into the three course meal and likened the experience to that of contestants on U.K. reality TV show I'm A Celebrity... Get Me Out Of Here!, who are often asked to eat insects as part of gruesome challenges.

However, when sampling a dish of ants, he accidentally knocked the critters into the unfortunate actress's lap.

Luckily, Lily was unperturbed by the incident, and was able to make a joke about her fellow guest's clumsiness, saying, "I've got ants in my pants!"

The Jonathan Ross show Christmas Special, which airs in the U.K on Saturday (26Dec15), also features guests including British rockers Coldplay and comedian Aziz Ansari.