On the last day of their trip to Barcelona, Mark Zuckerberg and his wife Priscilla were reunited with their close friend Gerard Piqué. The group were celebrating Priscilla's 31st birthday with a private dinner in a restaurant.
Mark naturally took to Facebook to share a candid picture of the festivities, which showed the tech legend sitting alongside his wife and gazing adoringly at her as they shared a laugh.
Seated next to Mark was FC Barcelona football player Gerard, who also posted a photo of the celebrations on Twitter. "Happy to see you again Priscilla and Mark. Hope you have had a great time in Barcelona!" he wrote.
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Mark Zuckerberg and his wife Priscilla were celebrating the doctor's 31st birthday
Gerard and his long-term girlfriend Shakira are good friends with Mark and Priscilla. They wrote an open letter on Facebook "from parents to parents" when Mark and Priscilla welcomed their first baby Max last year.
As well as offering their congratulations on the birth of the couple's daughter, Gerard and Shakira, who is a UNICEF Goodwill Ambassador, praised Max and Priscilla for their decision to donate a substantial amount of their Facebook shares to help children all over the world.
Gerard Piqué joined in the celebrations in Barcelona
"Your commitment to making the world a better place than you found it, and to empowering everyone to help make that a reality through all the tools you've listed here, education for all being one of them, show that success, when shared, has a multiplier effect," wrote mum-of-two Shakira.
"It's not about leaving anyone behind. It's about helping pull everyone, and humanity in general, forward."
Mark and Priscilla became first-time parents at the end of last year
The birth of baby Max, whose full name is Maxima, was announced on 1 December by proud dad Mark. The philanthropist and the paediatrician, who met at Harvard, wrote an open letter to their daughter, describing the world they hope their child will grow up in.
Having dated since 2003, Mark and Priscilla married in a simple ceremony in their back garden in 2012. The couple were also celebrating Priscilla's graduation from medical school.