Alamo City Comic Con have announced that Doctor Who and Torchwood star John Barrowman will be joining their line up of guests this October.

David Tennant, Billie Piper and Karen Gillan are already all announced as attending the fan convention which is taking place on the weekend on 28-30th October at the Henry B Gonzalez Convention Center, San Antonio, Texas.

David and Billie are attending on Saturday 29th October only, but John will be there on both Saturday and Sunday.

Click here for ticket info.

Keep up to date with all the latest fan convention appearances from David Tennant here