The pro basketball player bumped into Kardashian's former lover for the first time on a flight from Los Angeles to New Orleans on Sunday, mere days after a mystery bidder attempted to remove intimate footage of the pair from the internet.
Ray J boarded during a stop in Minneapolis, according to The Sun, and ventured over to congratulate Humphries on his recent nuptials.
Humphries is said to have pretended not to recognise Ray J, prompting the R&B star to state: "Come on, you know who I am. I just want to say congratulations."
"Oh yeah, yeah, I'm sorry. I know who you are," the publication quotes Humphries as replying.
The 26-year-old married Kardashian in a Montecito ceremony on August 21.
Kardashian and Ray J's sex tape was made in 2007 and is currently owned by Vivid Entertainment. Ray J claimed this week that he "absolutely" wants their clip taken off the market.