The actor, 59, confirmed in 2017 he had throat cancer.
RELATED: Tom Cruise makes surprise appearance to unveil Top Gun sequel trailer
Kilmer, who was sporting a Clippers hat, jeans and what looked like a trachea breathing device, wasn’t too responsive to a fan on the street that captured the actor on video.
While rumours swirl about his health, Kilmer has kept his Facebook page active to squash fake news.
“I guess there’s some rumour I’ve passed on but I’m alive and well friends,” he wrote earlier this month.
Reps for the veteran actor did not respond to requests for comment regarding his current health.
To celebrate the trailer for the sequel to the iconic 1986 film where he played opposite Tom Cruise, Kilmer posted a link to the video clip giving a nod to his co-star. Kilmer was previously confirmed to return as “Iceman”.
“You up for this one, Maverick?” he wrote.
Cruise was on hand to the surprise fans at Comic-Con to introduce the new Top Gun: Maverick trailer this week.
Kilmer, a father of two, makes appearances at various charity events; most recently the Monster Energy $50k celebrity charity basketball game, and he is active with art and his education foundation TwainMania.
Top Gun: Maverick is slated for a 2020 release.
This article originally appeared on the NY Post and was reproduced with permission