It's important to note that many of the TikTok accounts speculating about Ian and Nikki's marriage are encouraging Ian to get back together with Nina, whom he began dating in 2010. While the two were filming The Vampire Diaries together (and playing on-screen love interests), they embarked on a relationship. 

They announced that they amicably split in 2013, and they continued to make appearances together for the show. 

Nina has most recently been linked to Olympic snowboarder Shaun White.

Before Nikki and Ian got together, she was married to American Idol alum Paul McDonald. The pair met on the red carpet for the film Red Riding Hood in 2011, and they wed by October of that year. 

They announced that they were divorcing after a six-month separation in March of 2014. 

Three months after the divorce was finalized, Nikki married Ian in April of 2015.

As they've been indicating online, Ian and Nikki are still going strong after more than five years of marriage.