“Doctor Who” revealed some of the all-star cast that will mark the 50th anniversary. David Tennant and Billie Piper will join current Doctor and companion, Matt Smith and Jenna-Louise Coleman, while John Hurt (“Tinker Tailor Soldier Spy,” “Alien,” “Harry Potter”) will also co-star. Joanna Page (‘Gavin & Stacey,’ ‘Love Actually’) will also be appearing in the 50th anniversary special!

Last seen as the Doctor on January 1, 2010, this will be the first time Tennant has reprised his role as the Tenth Doctor. During his reign as the Time Lord, Tennant appeared in three series as well as several specials. He was first revealed as the Doctor in the 2005 series finale, “The Parting of the Ways.”

Meanwhile Billie Piper, who played companion Rose Tyler for two series following the reboot in 2005, will appear in the show for the first time since featuring in Tennant’s last episode, “The End of Time” in 2010.

Also confirmed to join the cast is John Hurt who will also co-star in the anniversary special that will form part of blockbuster celebrations. Produced by BBC Cymru Wales for BBC One, the 50th anniversary will be written by Steven Moffat and Directed by Nick Hurran.

Filming for the 50th anniversary begins this week in the UK. Meanwhile, “Doctor Who” returns with all-new episodes to BBC America on Saturdays at 8:00pm ET/PT. “Doctor Who” will be immediately followed by all-new episodes of the new original series “Orphan Black” at 9:00pm ET/PT and Chris Hardwick’s “The Nerdist” at 10:00pm ET/PT as part of BBC America’s Supernatural Saturday.

Additionally, David Tennant’s two-part special “Spies of Warsaw” premieres on Wednesday, April 3, 9:00pm ET as part of BBC AMERICA’s Dramaville programming block. Adapted by renowned Emmy®-winning writing team Dick Clement and Ian La Frenais (“Across the Universe,” “Tracey Takes On…”) and executive produced by Richard Fell (“Outcasts”), “Spies of Warsaw” is based on The New York Times Bestselling author Alan Furst’s acclaimed novel. David Tennant and Janet Montgomery (“Made in Jersey,” “Black Swan,” “Entourage”) star in the thrilling spy story set in Poland, Paris and London in the years leading up to the Second World War.