This SmackDown star continues to make the rounds.

That star is Rusev, who is growing into one of the most popular superstars that the sports entertainment company.

One of the reasons is due to the success of the Rusev Day, which he spoke about in an interview with ESPN.com.

"I had no idea this was going to happen," Rusev said to ESPN. "This was supposed to be a one-time 'Rusev Day' thing.

I never thought in a million years it was going to be what it is today. It was something we planned to do, but just for one day. But it just caught on fire ever since then. Nobody expected that."

Rusev signed with WWE in September of 2010 and was assigned to WWE's Florida Championship Wrestling (FCW) developmental territory in Tampa, Florida, where he adopted the ring name Alexander Rusev.

Lana signed with WWE in June of 2013 and was sent to their developmental branch NXT. She debuted on the October 23, 2013, episode of NXT, under the ring name Lana, scouting Alexander Rusev. The following month, WWE put her as Rusev’s manager on television. They had a short run while in the developmental brand.

"I've just been enjoying it," Rusev said. "I've been booed out of the building for the past four years. So finally the people now appreciate me.

But I'm just having fun, I'm just doing me. Every bad guy or good guy, we all enjoy the crowd reaction, so I'm just going with it."

"By far it's the most fun I've had in my career," Rusev said. "I mean, I loved WrestleMania 31 with the tank -- that was amazing, of course.

But now I'm showing everybody that you don't have to be stuck being a foreigner bad guy. Being a foreigner bad guy doesn't have to be my destiny, and I can be much more than that."

Fast forward to May of that year; they made their television debut. WWE has kept both Rusev and Lana strong on television. Rusev would end up winning the United States Title while with her.

In October of that year, TMZ reported that Lana had gotten engaged to Rusev, which Lana confirmed. This led to Lana making her return to WWE TV as a villainess and by Rusev’s side. WWE then took her off of TV until February of 2016 where she was pushed as a singles star.

Lana faced off with Brie Bella in a tag team match on the WrestleMania 32 pre-show. This would be Lana's in-ring debut. After this match, WWE once again put her with Rusev until they were drafted to SmackDown Live earlier this year. There is a trend here. When Lana and Rusev are together, they have success, but when separated, not so much.