Prince William wasnt afraid to get a little risqu during a recent radio interview.

The Prince of Wales appeared on BBCs Radio 1 Going Home show on Tuesday while he and his wife, Kate Middleton , were in Birmingham to mark World Mental Health Day.

On the show, the prince and princess were asked about their most-used emoji.

William quipped that his was the aubergine likely better known to Americans as the eggplant.

Is this a clean thing or is this a family one? William said to laughs from hosts Jordan North and Vick Hope. Ive been told not to say the aubergine, so Ive got to pick something else.

It would have been the aubergine but Im saying now because Ive got to be all grown up its the one where the eyes go up and down and the mouths out, William continued.