• Serena Williams wore a pale pink Versace dress to Prince Harry and Meghan Markle's royal wedding service at St. George's Chapel.
• The tennis champion later changed into a floral Valentino dress before heading to Harry and Markle's nighttime reception at Frogmore House. 
• In a relatable move, Williams finished the flirty, modern look with a pair of stylish black sneakers, which were also designed by Valentino's creative director Pierpaolo Piccioli.

After attending Prince Harry and Meghan Markle's wedding ceremony, Serena Williams changed into something a bit more comfortable for the royal couple's intimate evening reception.

The tennis champion, who was accompanied by her husband, Reddit co-founder Alexis Ohanian, wore a long-sleeve, pale pink Versace dress to Harry and Markle's service at St. George's Chapel. Williams paired the chic look with matching pink heels and a whimsical tulle headpiece, keeping in tradition for the royal occasion.

Williams later changed into a floral Valentino dress before heading to Harry and Markle's nighttime reception at Frogmore House. In a relatable move, the tennis star finished the flirty, modern look with a pair of stylish black sneakers, which, as she revealed online, were also designed by Valentino's creative director Pierpaolo Piccioli. 

"Little known fact: I often wear sneakers under my evening gown," Williams wrote on Instagram and Twitter. According to her social media posts, Piccioli gave the sneakers to her last minute as the tennis champion "[tends] to be comfy for long nights."

As it turns out, Williams wasn't the only person to prioritize comfort at the royal occasion.

Actress Troian Bellisario revealed on her Instagram story that guests at the evening reception were given slippers to change into if their own shoes were getting uncomfortable. Given that the royal wedding spanned the course of an entire day, these slippers were a thoughtful touch on Harry and Markle's part. 

Bellisario — whose husband, Patrick J. Adams, played Markle's on-screen husband in "Suits"— and Williams, who met Markle at DIRECTV's Celebrity Beach Bowl in 2014, were among many celebrity guests at the royal wedding on Saturday.

More on the royal wedding:

• 16 ways in which Meghan Markle's life will change when she joins the royal family
• Prince William left a seat next to him empty at the royal wedding so the queen could get an unobstructed view
• Meghan Markle wore one of Princess Diana's rings to the royal wedding reception and people are here for it
• Here's why British people wear hats to every major occasion — including the royal wedding
• See all the celebrities who attended the royal wedding — from Oprah Winfrey to George Clooney

You can read all of INSIDER's royal wedding coveragehere.

Sign up here to get INSIDER's favorite stories straight to your inbox.

Join the conversation about this story »

NOW WATCH: These are the most dominant athletes in every sport