Playboy founder Hugh Hefner's son, Cooper Hefner, weds 'Harry Potter' actress Scarlett Byrne

Congratulations are in order for Cooper Hefner and Scarlett Byrne!

The son of late Playboy founder Hugh Hefner wed the "Harry Potter" actress at the County Clerk's Office in Ventura, California, on Monday.

"Scarlett and I have made it officially legal and the two of us could not be happier," Hefner announced on Twitter. "Cheers to a life full of love, happiness, adventure, and great purpose, Mrs. Hefner. I very much look forward to planning our wedding celebrations in the months ahead. I love you, Scarlett."

Along with the announcement, Hefner, 28, shared four photos of himself with his new wife, to whom he got engaged in 2015.

"Cooper and I are excited to share that we legally married. We are looking forward to planning our wedding in the coming months where we will celebrate further with our friends and family," Byrne, 29, wrote on Instagram as she shared  photo from the clerk's office. "I love you Cooper. I am proud to stand by your side, as your partner, your friend, and your wife. I cannot wait to continue building a life together. My heart is so full and I am so grateful for our love."

Cooper is one of the late Hugh Hefner's four children. His mother is Kimberly Conrad, who was married to the Playboy icon from July 1989 until March 2010. 

While he was formerly the Chief Creative Officer of Playboy, Byrne is best known for playing Pansy Parkinson in three "Harry Potter" films.

12 PHOTOS
Hugh Hefner and Kimberley Conrad together
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Hugh Hefner and Kimberley Conrad together
(Original Caption) 3/9/1988-Los Angeles, California- Hugh Hefner tickles the leg of his latest significant other, Kimberly Conrad, 25, who was Playboy's centerfold, before speaking to reporters at a press conference in Los Angeles. Heffner announced he had filed a counter-suit against his former significant other, Carrie Leigh, accusing her of infidelity.
BEVERLY HILLS, CA - MARCH 10: Hugh Hefner and Kimberley Conrad attend 16th Annual American Film Institute Lifetime Achievement Awards Honoring Jack Lemmon on March 10, 1988 at the Beverly Hilton Hotel in Beverly Hills, California. (Photo by Ron Galella, Ltd./WireImage)
BEVERLY HILLS, CA - OCTOBER 19: Hugh Hefner and Kimberley Conrad attend Princess Grace Foundation Gala Honoring Cary Grant on October 19, 1988 at the Beverly Hilton Hotel in Beverly Hills, California. (Photo by Ron Galella, Ltd./WireImage)
LOS ANGELES, CA - MAY 23: Hugh Hefner and Kimberley Conrad attend the perofmance of 'Phantom of the Opera' on May 23, 1989 at the Ahmanson Theater in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
American publisher Hugh Hefner with his wife Kimberley Conrad, circa 1990. (Photo by Kypros/Getty Images)
BEVERLY HILLS, CA - DECEMBER 3: Hugh Hefner and Kimberley Conrad attend Society of Singers Gala on December 3, 1990 at the Beverly Hilton Hotel in Beverly Hills, California. (Photo by Ron Galella, Ltd./WireImage)
American publisher Hugh Hefner with his wife, Playboy Playmate Kimberley Conrad and their son Marston Hefner at the Playboy Playmate Of The Year Celebration, 25th April 1991. (Photo by Kypros/Getty Images)
BEVERLY HILLS, CA - AUGUST 27: Hugh Hefner, Kimberley Conrad and son Marston Hefner attend Playboy Mansion Open House Party on August 27, 1992 at the Playboy Mansion in Beverly Hills, California. (Photo by Ron Galella, Ltd./WireImage)
Hugh Hefner and Kimberley Conrad in Photo Booth (Photo by Frank Trapper/Corbis via Getty Images)
BEVERLY HILLS, CA - APRIL 6: Hugh Hefner and Kimberley Conrad attend Playboy Magazine Party on April 6, 1995 at the Playboy Mansion in Beverly Hills, California. (Photo by Ron Galella, Ltd./WireImage)
CENTURY CITY, CA - OCTOBER 9: Hugh Hefner and Kimberley Conrad attend Friar's Club Gala Honoring Hugh Hefner on October 9, 1998 at the Century Plaza Hotel in Century City, California. (Photo by Ron Galella, Ltd./WireImage)
BEL AIR, CALIFORNIA - OCTOBER 18: Hugh Hefner and his former wife Kimberley Conrad Hefner who both accepted Wildlife achievement awards at the 9th annual 'Safari Brunch' at the Playboy Mansion to benefit the Wildlife Waystation, Country's Premier wild Animal Refuge October 18, 2003 in Bel Air, California. (Photo by Frazer Harrison/Getty Images)
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