'Harry Potter' star Scarlett Byrne welcomes twins with Hugh Hefner's son

LAS VEGAS, NV - JULY 28:  Chief Creative Officer of Playboy Cooper Hefner (L) and his fiance Scarlett Byrne arrive at Playboy's Midsummer Night's Dream at the Marquee Nightclub at The Cosmopolitan of Las Vegas on July 28, 2018 in Las Vegas, Nevada.  (Photo by David Becker/Getty Images for Playboy)
Cooper Hefner and Scarlett Byrne have welcomed twin baby girls. (Getty Images for Playboy)

Harry Potter actress Scarlett Byrne has welcomed twins with Playboy heir Cooper Hefner.

The 31-year-old actor – who played Slytherin student Pansy Parkinson in the Harry Potter movies – announced the addition of two new daughters to her family with the 30-year-old son of the late Hugh Hefner.

Byrne wrote on Instagram: "My heart grew twice as much this weekend as Cooper and I welcomed our daughters, Marigold Adele Hefner and Blossom Pearl Hefner into the world. Our home is full of love with our three daughters and we couldn’t be happier."

Hefner added on Twitter: "Scarlett and I are overjoyed to share that we welcomed Marigold Adele Hefner and Blossom Pearl Hefner into the world on Saturday, March 26th. Today, we are settling back in at home. How blessed we are to be gifted with their life. How lucky we are to be given this love."

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Ellie Darcey-Alden — who played a young Lily Potter in the films — was among those to share their congratulations on social media.

She wrote: “So proud of you Scarlett! Those girls are so lucky to have you.”

The couple - who married in 2019 - welcomed their first child, another daughter named Betsy in 2020.

Hefner and Byrne – who have been dating since August 2015 – tied the knot at a registry office in Ventura, California, in November 2019.

Scarlett Byrne in 'Harry Potter and The Half-Blood Prince'. (Warner Bros.)
Scarlett Byrne in Harry Potter and The Half-Blood Prince. (Warner Bros.)

Byrne — who made her debut in the sixth movie in the series, Harry Potter and the Half-Blood Prince in 2009 — posed nude for Playboy magazine in February 2017.

In 2018, she joined Harry Potter co-star Evanna Lynch on Dancing With The Stars for the trios dance.

Cooper is the youngest of the late Hugh Hefner’s four children. He has a brother Marston, who is just one year older than him, who the Playboy mogul fathered with second wife Kimberley Conrad.

He also has a half-sister Christie, 68, and 66-year-old half-brother David, who Hef had with his first wife Millie Williams.

Harry Potter stars Evanna Lynch and Scarlett Byrne on Dancing With The Stars in 2018.
Harry Potter stars Evanna Lynch and Scarlett Byrne on Dancing With The Stars in 2018. (Getty Images)

Cooper is a businessman and was previously the chief creative officer of Playboy Enterprises. In July he announced he is running as a Democrat for the California Senate.

Read more: Harry Potter's Bonnie Wright marries boyfriend Andrew Lococo

Hugh Hefner died in 2017 aged 91, leaving behind an estimated $50m fortune and a business empire based around the Playboy brand.

Watch: Harry Potter's Evanna Lynch admits being intimidated by co-stars