VIEWERS and audience members got a surprise from Sam Heughan at the special event celebrating the launch of his and Graham McTavish's new book.

The Scottish actors famous for their roles in TV series Outlander have recently published a book called the Clanlands Almanac, described as a seasonal guide to all things Scotland.

The book sees Heughan and MacTavish turn tour guides as they take an adventure through Scottish legends and traditions.

The National: Graham McTavish and Sam Heughan enjoy a dram beside their campervan while filming the TV series Men In Kilts. Picture: Robert Wilson/Starz

The live event, which was broadcast live on the evening of November 8, saw the pair in discussion with Scottish radio DJ and presenter Edith Bowman.

A clip of the event shared to Twitter sees Heughan and McTavish waving to the audience at home as Bowman says the camera is "really badly positioned" for the two men in kilts.

Heughan took the opportunity to show off his kilt to the viewers at home and the audience at the Theatre Royal in London.

Bowman can then be heard saying: "Oh you tease."

McTavish then quips that for "some people it's going to be breakfast time".

The event was well received and the end saw the three on stage celebrate with a ceilidh and encouraging others in the theatre to join in.

You can view the full event by heading over to Fane Productions at this link and the streamed event is available until next Tuesday (November 16).