Derry Girls creator Lisa McGee has been desperate to get Chelsea Clinton to work with her since she was a teenager, and her wish finally came true for the finale.
Derry Girls fans saw the show bow out in style, with an extended special set around the 1998 Good Friday Agreement.
There were a couple of sneaky cameos too, with Liam Neeson back once again in a particularly emotional moment of the last-ever episode.
But fans were beside themselves after the daughter of former US President Bill Clinton – who was fundamental in paving the way for the Irish peace process – Chelsea, turned up in the final moments.
In a poignant scene, she takes in the mail with a smile and starts reading the letter that the main characters – Erin (Saoirse-Monica Jackson), Clare (Nicola Coughlan), Michelle (Jamie-Lee O’Donnell), Orla (Louisa Harland) and James (Dylan Llewellyn) – wrote her in the final episode of season two.
However, it turns out her one-off appearance has been years in the making, with Lisa having previously written to Chelsea when she was a teenager.
Caolán McAree shared the story on Twitter, and wrote: ‘Lisa McGee wrote to Chelsea Clinton when she was 13, inviting her to the Strand Cinema in Derry, she didn’t get a response.
‘Today Chelsea appeared in Lisa’s award winning TV show, that’s quite something. #DerryGirls.’
Viewers were buzzing to witness the surprise cameo, wondering ‘how the hell’ the creator managed to get her involved.
One fan said: ‘Ok getting chelsea clinton is iconic as all f**k but i got so excited thinking we were getting a present day epilogue #DerryGirls.’
‘Without doubt the most moving piece of TV I’ve ever seen & Chelsea Clinton 👏👏👏 #DerryGirls,’ said a viewer.
‘Howling that they acc got Chelsea Clinton to be in derry girls 😭😭 last episode was so good #derrygirls #derrygirlsfinale,’ added someone else.
‘F**k off Chelsea Clinton!!! How the hell did Lisa pull this out the bag!! @ChelseaClinton @LisaMMcGee #DerryGirls,’ echoed another.
Writer Lisa previously said of the extended episode: ‘Like all the very best 90s bands, I couldn’t resist ending our farewell tour with an encore for our loyal fans. I’m delighted to say we’ll be returning for one extended special – airing in the same week as our final episode.
‘The special deals with the historic and momentous Good Friday Agreement vote, which coincides with the gang’s coming of age, they enter adulthood just as Northern Ireland embarks on a new future.’