Phoebe Tomlinson is pregnant with her second child.

The Baby War actress and influencer - and younger sister of One Direction star Louis - took to Instagram on Wednesday (01July26) to announce the happy news that she and her footballer boyfriend Jack Varley will soon be adding to their family.

Posting a series of cute pictures of herself, Jack and daughter Olive in their garden, Phoebe wrote: "One more to adore.

"We're delighted to announce that Olive is going to be a big sister!"

Louis was one of the first to comment on the post, writing that the "first picture is too cute".

The picture he was referring to showed Olive clutching an ultrasound picture of her brother or sister, while Phoebe and Jack smiled in the background.

Other congratulations comments came from Love Island UK star Zara McDermott, who is dating Louis, who wrote: "The most perfect news!"

In response to her remark, one fan commented: "Oh Zara you are so sweet. I just know you are going to be a great auntie to this baby."

Phoebe's other siblings also offered their congratulations to the 22-year-old, with Daisy writing that she was "screaming crying", as Lottie said it was "so exciting", adding: "Love you all so much!"

Meanwhile, Love Islander Shaughna Phillips wrote: "Congratulations lovely, the best news!"

And Molly-Mae Hague, who recently welcomed son Midas with boyfriend Tommy Fury, added: "Congratulations girly!!!!"

As another fan commented: "So beyond happy for you guys!!!! Olive is literally going to be the best big sister ever."

While someone else wrote: "I'M SO HAPPY FOR YOU WHATTT, I kinda guessed it yesterday or 2 days ago from the pictures of the event when you were holding your tummy."

Louis has never made a secret of his love for niece Olive, and regularly appears in videos with the little girl on his sister's social media pages, with fans calling him the "best uncle ever".

While Phoebe has previously defended herself for being a "young mum" - as she gave birth to daughter Olive when she was just 20 years old.