Timothée was born and raised in America, but his father is from France, which explains his unique name. Despite the accent mark, he pronounces his first name how you would imagine - "Timothy." However, he has said in various interviews that's supposed to be "Tim-o-tay," not Timothy. Sounds like he's fine with you saying it either way, though!
The actor's last name is a tad bit trickier. You may have been thinking it's "Shal-met" or even "Chal-met," but it has way more flair. Thankfully, back in 2014, when he was starring in Showtime's Homeland, Timothée was interviewed by Teen Vogue