Doctor Who fans have gone wild after spotting Catherine Tate’s hidden message during her Eurovision appearance last night (13 May).

The national treasure has sent Whovians all over into a complete frenzy, after making a private in-joke at last night's iconic international song competition.

Eagle-eyed fans have since flocked to social media after spotting the secret reference and lets just say they were very excited.

The comedian was greeted by Eurovision co-hosts presenter Graham Norton, and Sex Education and Ted Lasso star, Hannah Waddingham.

"She's here! She's in the all," Norton told the cheering crowd and excited viewers at home.

Tate then greeted the audience, saying: "Hello Liverpool," in her typical comically charming fashion.

"I have been hooked on Eurovision ever since I was a little girl," she added.

However, during the iconic cameo, fans noticed something a little extra.

BBC

Namely, that the star managed to successfully drop the famed Doctor Who reference into her brief but nonetheless iconic appearance on the show.

Speaking to Norton and Waddingham, Tate said, you guessed it 'allons-y'.

Now, if you've been living under a rock or simply need some brushing up on your tardis-based trivia, 'allonsy' refers to a frequently-used quote by the Tenth Doctor, who was played by David Tenant.

'Allons-y' translates from French to 'let's go' and was one of the Tenth Doctor's favourite sayings.

So, it was no wonder that fans went wild after Tate exclaimed 'allons-y', whilst announcing the 12 points given by the United Kingdom at the Eurovision Song Contest.

BBC

Whovians took to Twitter to share their reactions to the reference.

Brace yourself - there were a lot of capital letters.

One Twitter user posted: "CATHERINE TATE SAID ALLONS-Y CATHERINE TATE SAID ALLONS-Y CATHERINE TATE SAID ALLONSY."

A second, equally enthused fan tweeted: "CATHERINE TATE SAID ALLONS-Y ON EUROVISION!"

"CATHERINE SAID ALLONS-Y HAHAHAHA," echoed a third.

A fourth added: "Bonus points for the accent haha."

A fifth fan in total disbelief revealed: "I thought I misheard! Brilliant!!"

"Catherine Tate dropping in the ‘allons-y’ for all the Doctor Who fans there!" penned a sixth.

"I freaked out when she said that," admitted another while a final Twitter shared their similar reaction with: "In the moment she said that, I escalated."

And the BBC even got involved, with the official BBC Eurovision account commenting on the perfectly-executed reference.

"Catherine Tate," they posted with a crying laughing emoji, "but did we expect anything less?!"