Los Angeles, Jan 17 (IANS): Filmmaker James Gunn has offered $100,000 to know the accurate weight of US President Donald Trump.

After Trump's first physical assessment as President was made public on Tuesday, the "Guardians of the Galaxy" filmmaker didn't believe the results which says that Trump is 6 feet 3 inches tall and weighs 239 pounds, reports hollywoodrepoerter.com.

"I will give $100,000 dollars to Trump's favourite charity if he will step on an accurate scale with an impartial medical professional, okayed by both of us. For real. Girther, #GirtherMovement," Gunn tweeted.

The hashtag is a play on Trump's birther movement, in which he claimed former President Barack Obama was not born in the US.

"Trump's medical exam says he's 6' 3" and 239 pounds. Albert Pujols is 6'3" and 240 pounds. If the dementia tests are equally accurate, we are doomed," added the filmmaker, who posted side-by-side photographs of the professional baseball player and Trump.