Doctor Who star Millie Gibson stuns in a white polka dot mini dress as she celebrates her 20th birthday with a swanky dinner ahead of blockbuster series finale

Fans are eagerly counting down the hours until Saturday's finale.

And Doctor Who star Millie Gibson celebrated her 20th birthday in style, with a swanky dinner in London on Wednesday.

The actress, who has gripped audiences with her role as The Doctor's companion Ruby Sunday, slipped into a fun polka dot mini dress as she headed out for dinner with her pals.

This weekend the new series of Doctor Who will come to its much-anticipated conclusion, with viewers hoping to discover the truth about Ruby's birth mother.

Millie took to Instagram Stories to share a selection of snaps from her birthday celebrations, including a glimpse of the cake she was gifted by her pals.

Doctor Who star Millie Gibson celebrated her 20th birthday in style, with a swanky dinner after being surprised with cake by her co-stars on Wednesday

The actress was surprised with a cake by her co-stars, after taking a break from filming a new reimagining of The Forsyte Saga

The actress is currently filming a new reimagining of The Forsyte Saga, where she is set to portray the iconic character of Irene, after wrapping filming on Doctor Who's second series last month.

Millie also posted a stunning selfie clad in a busty spotted mini dress, as she headed out for dinner at the Casa restaurant.

Sharing another image with her pals following the meal, Millie captioned her post: 'Thank you for all the birthday wishes, feeling the love.'

On Saturday, Doctor Who fans were left aghast as the latest episode ended on a jaw-dropping cliffhanger.

The new series, the first with Ncuti Gatwa starring as The Doctor and Russell T Davies as returning showrunner, is set to conclude this weekend, after the shocking revelation that God Of Death Sutekh has returned from imprisonment.

In the series' penultimate episode, Doctor Who fans hoped that they would finally discover the truth about the mysterious woman who had appeared in multiple incarnations throughout the TARDIS' adventures.

Played by actress Susan Twist, the woman appeared as a variety of characters, from a 60s tea maid and an AI-generated ambulance, to finally, the modern tech mogul Susan Triad.

In the episode, The Doctor and Ruby sought help from UNIT to find out the truth about the woman, and answers about the companion's birth mother, who abandoned her daughter at a snow-covered church on Christmas Eve.

Millie also posted a stunning selfie clad in a busty spotted mini dress, as she headed out for dinner at the Casa restaurant

On Saturday, Doctor Who fans were left aghast as the latest episode ended on a jaw-dropping cliffhanger 

This weekend the new series will come to its much-anticipated conclusion, with viewers hoping to discover the truth about Ruby's birth mother 

In some of the show's scariest scenes yet, it was revealed that the long-imprisoned God Of Death Sutekh had been waiting in the TARDIS, and finally unveiled himself and his plot to turn the universe to dust.

It remains to be seen whether The Doctor can bring an end to this threat, and finally reveal the truth about her birth mother.

Fans praised the episode, with one penning on X: 'Rather enjoyed that Doctor Who episode. Best of the series';

'That reveal was 1000/10'; 'What an amazing episode. I cannot wait until next week!' 

Doctor Who's series finale will be released at midnight on Saturday on BBC iPlayer in the UK, and will air at 6:40pm on BBC One that evening. The series is available to stream internationally on Disney+.