When Serena Williams got married to her now-husband Alexis Ohanian last November, it was a wedding that was fit for royalty. Despite the fairytale day, it may not come close to her friend Meghan Markle's wedding to Prince Harry on May 19.

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The American appeared on Good Morning America and gave some advice to the soon-to-be Duchess.

"I just think it's so important to enjoy the moment. And eat cake! I didn't get to eat mine at my wedding. We were just having so much fun," she said. However, she says she might not attend the party due to her tournament scheduled.

Williams has yet to break back into the Top 250 since returning to the tour in Indian Wells after taking a break to have her daughter Alexis Olympia Jr. Her most recent match was a straight-set loss to Naomi Osaka in the first round of the Miami Open.