Please join us as we raise our glasses to wish John Simm a very happy birthday today!

The actor played the Master in Series 3 and The End of Time, and we hope he has a spectacular day as he turns 41!

Leave your own messages for John in the comments, and let us know if you’d like to see the Master make another return in the future. John himself isn’t against the idea, but is there life in the old Time Lord yet? Have your say…

Please join us as we raise our glasses to wish Eve Myles a very happy birthday!

The actress, who plays Gwen Cooper in Torchwood, turns 33 today, and we hope she has a great day! Got any birthday messages for her? Leave ‘em in the comments!

There’s also another reason for Eve and Torchwood fans to celebrate today, as the new series, Miracle Day, begins in the US tonight on Starz at 10pm ET/PT!

Please join us as we raise our glasses to send out our best wishes over to Arthur Darvill!

The actor, who plays Rory Williams in Doctor Who, turns 29 today, and we hope he has a wonderful day! Feel free to leave your own messages below.

Arthur will be starring as Mephistopheles in an upcoming production of Doctor Faustus, which opens at the Globe on 23rd June. Best of luck!

Please join us as we send out our best birthday wishes to Colin Baker!

The actor, who played the Sixth Doctor in the 1980s, turns 68 today, and we hope he has a wonderful day! Feel free to leave your own messages for Colin in the comments section below.

If you’re not doing so already, go follow him on Twitter @SawbonesHex!

Please join us as we send out our best birthday wishes to Catherine Tate!

The actress – who played Donna Noble in Doctor Who – turns 43 today, and we hope she has a brilliant day! She was first seen in the series at the end of Series 2’s Doomsday, and, after an initial one off appearance in The Runaway Bride, went on to return to the TARDIS full time in Series 4. Donna was last seen in The End of Time… we wonder how she spent her lottery winnings?

Catherine will be working with David Tennant again in a production on Much Ado About Nothing, which opens in the West End next Monday, 16th May. Best of luck to them both!

Please join us as we raise our glasses to wish David Tennant a very happy birthday!

The Tenth Doctor actor turns 40 today, and we hope he has a brilliant day! He recently welcomed his first child to the world with fiancée Georgia Moffett, and in the summer he’ll be taking to the West End to star in a production of Much Ado About Nothing alongside Catherine Tate.

Leave your own birthday messages for David below.

Please join us as we send out our best birthday wishes to Peter Davison!

Peter – who turns 60 today – is known by Doctor Who fans as the Fifth Doctor, who he played from 1981 to 1984. A new generation of fans were introduced to him when he returned to the role in 2007 for the special Children in Need mini-episode, Time Crash.

We hope he has a great day! Leave your messages below.

Please join us as we send out our best birthday wishes to Gareth David-Lloyd!

The actor played Ianto Jones in Series 1, Series 2 and Series 3 of Torchwood, and is today celebrating his 30th birthday. We hope he has a brilliant day!

Feel free to post your own birthday wishes for Gareth in the comments. You can read our exclusive interview with him - conducted last October - here.

Please join us as we send out huge birthday wishes to Freema Agyeman!

The actress is celebrating her 32nd birthday today, and is best known in the Doctor Who universe as the Doctor’s companion, Martha Jones, who has to date appeared in Series 3, Series 4, The End of Time, Part Two and Torchwood. We hope she has a brilliant day!

Leave your own birthday messages in the comments.

Please join us as we raise our glasses to wish Alex Kingston a very happy birthday!

The actress is today celebrating her 48th birthday, and we hope she has a brilliant day! She’ll be back on our screens in Doctor Who as the enigmatic River Song in the new series, but will we be any closer to finding out who she really is? Only time will tell!

You can leave your own birthday messages for Alex below.