Michael Loccisano/Getty Images for DirecTV
It is fitting that Meghan met the tennis superstar through athletics as the friends hit it off when they both competed in DirecTV's Celebrity Beach Bowl together in February 2014.
On her now-defunct lifestyle blog The Tig, Meghan revealed, "We hit it off immediately, taking pictures, laughing through the flag football game we were both playing in, and chatting not about tennis or acting, but about all the good old fashioned girl stuff. So began our friendship."
"We are both the same age, have a penchant for hot sauces, and adore fashion, but what connects us more than those things is perhaps our belief in exceeding expectations—our endless ambition," she added.
That friendship also included supporting each other's endeavors (Serena even wrote a few guest columns on The Tig!), both privately and on social media.
"She quickly became a confidante I would text when I was traveling, the friend I would rally around for her tennis matches," Meghan wrote on her blog, "and the down to earth chick I was able to grab lunch with just a couple weeks ago in Toronto."
While she hasn't been able to attend as many matches lately, Meghan has shown her support for Serena in other ways, most notably wearing pieces from Serena's clothing line to major events, including one of her first public outings after announcing she was expecting her first child.
"We had sent stuff to her a while ago, so we were excited to see it," Serena told Marie Claire of seeing the photos. "I've known her for years, and it's cool to see your friend help you out without even trying."
She continued, "I was like, ‘Meghan, thanks!' And she was like, ‘Why are you thanking me? We're friends!'"