John Cena and Nikki Bella have reached the four-year milestone in their relationship.

The "Cenation" leader and "Fearless" WWE Superstar began dating in August 2012 and four years later they're still going strong despite different philosophies on marriage and children.

Both WWE personalities took to Twitter to acknowledge reaching their relationship milestone on Twitter.

Cena will play a pivotal role for the WWE at SummerSlam on Aug. 21 at the Barclays Center in Brooklyn. The 15-time World Champion will go one-on-one with AJ Styles in one of the big high-profile matches of the night.

Bella, meanwhile, is still making her way back to the squared circle. The former longest-reigning Divas Champion of all time suffered a neck injury back in September and underwent surery to repair it in January.

She has been working her way back to the squared circle, but hasn't been medically cleared to compete. When she returns, she'll be making a comeback to a very different WWE now that the company has undergone a brand split.

Bella's sister, Brie, retired from the ring in April after WrestleMania, but Cena is on the "SmackDown" brand along with her brother-in-law, former WWE Superstar Daniel Bryan, who serves as the general manager under commissioner Shane McMahon.

It's more than likely Bella will end up on the Blue Brand upon her return.

The Bella Twins will also be hitting the small screen again on Oct. 5 when "Total Bellas" premieres. The show features both ladies and their significant others living together under the same roof where tensions rise.

Cena and Bella may have acknowledged their dating anniversary, but it may take some time before they ever have a wedding anniversary. The "Cenation" leader hasn't seen eye-to-eye with his girlfriend about the future.

"I just have things I need to get done," Cena recently told Rolling Stone.. "It's not negotiable. We've been to therapy over it. I don't think it will ever be over with. I'm stubborn as f--k and extremely selfish as well. I don't want kids, I don't want marriage. That's me just saying, 'Hey, this is my life and this is how I'm going to live.'"

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