The next Doctor of BBC America's hit series Doctor Who will be announced during a live special this Sunday afternoon, August 4 at 2 PM ET LIVE on BBC America and BBC One in the U.K.

Widely regarded as one of the most hotly contested roles in British television, the special's host Zoë Ball will unveil the Twelfth Doctor in their first-ever interview in front of a live studio audience. The half-hour show will include live special guests, Doctors old and new, as well as companions and celebrity fans. Current Doctor Matt Smith and lead writer and executive producer Steven Moffat will both give interviews in the special.

Here's what Steven Moffat had to say about who is stepping in for Matt Smith, who announced in June he is leaving after Season 7.

"The decision is made and the time has come to reveal who's taking over the TARDIS. For the last of the Time Lords, the clock is striking twelve."

Matt Smith will make his penultimate appearance in the 50th Anniversary Special on Saturday, November 23, and his Eleventh Doctor will regenerate in the Christmas Special. Doctor Who is produced by BBC Cymru Wales.