Casey Affleck Welcomes Jennifer Lopez 'to the Family' After Missing Brother Ben's Wedding Celebration
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Casey Affleck is celebrating his new sister-in-law Jennifer Lopez.
After missing her wedding to his brother Ben Affleck over the weekend, due to what a source previously told PEOPLE were "parental obligations at home," Casey, 47, penned a sweet tribute to the "On the Floor" singer in an Instagram post Sunday.
"Good things are worth waiting for," he wrote alongside a throwback image of himself, Ben, 50, and Lopez, 53, walking in Los Angeles in August 2002. "Here is to twists and turns, new beginnings, and finding new reservoirs of old love."
"Welcome to the family. Get ready for some real dysfunction! Kidding. I am kidding," Casey continued.
Closing the post, the Oscar winner wrote, "Jen, you are a gem. We love you so much!!!" with a red heart emoji.
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RELATED: Casey Affleck Missed Brother Ben Affleck's Wedding Celebration Due to 'Parental Obligations'
Ben and Lopez celebrated their wedding with a ceremony in Georgia Saturday in front of friends and family, just over a month after saying "I do" in Las Vegas.
Lopez wore a white Ralph Lauren gown with a long, flowing train and veil at the weekend ceremony, with Ben in a tuxedo with a white jacket and black pants. Photographs showed them walking down a white aisle followed by their children. Popular podcaster and life coach Jay Shetty officiated the ceremony.
A source tells PEOPLE that the day was a dream come true for Lopez.
"Jennifer thought the wedding was perfect. It was a dream for her," the insider said. "She loved having all the kids there. She loved the location. It all felt very special."
On married life, they added, "She feels extremely happy being married to Ben. She keeps saying 'my husband' and it's very cute."
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Stars in attendance included Ben's longtime friend Matt Damon and his wife Luciana, director Kevin Smith and his wife, Jennifer, Clerks actor Jason Mewes and his wife, Jordan Monsanto, and top Hollywood talent agent Patrick Whitesell and his wife, model/actress Pia Miller.
Guests were photographed wearing all white on the grounds of Ben's 87-acre compound outside Savannah. Preparations for the nuptials included a marquee on the estate with white chairs set up for guests surrounded by greenery and white flowers, an all-white piano and elegant tables set up on a riverfront dock.
RELATED VIDEO: Inside Jennifer Lopez and Ben Affleck's Surprise Las Vegas Wedding: All the 'Beautiful' Details
After dating from 2002 to 2004, Ben and Lopez rekindled their romance last year and announced their engagement in April.
The couple tied the knot at A Little White Wedding Chapel in Vegas during intimate midnight nuptials last month. A source told PEOPLE: "The Las Vegas ceremony was perfect. They both loved it. It was private and low-key. That's all they asked for."
When Lopez revealed in her On the JLo newsletter in July that she and Ben got married, the actress and singer wrote that the late-night ceremony was "exactly what we wanted."
She added that "in the end it was the best possible wedding we could have imagined. One we dreamed of long ago and one made real ... at very, very long last."
"When love is real, the only thing that matters in marriage is one another and the promise we make to love, care, understand, be patient, loving and good to one another. We had that. And so much more. Best night of our lives," Lopez said.
