Olympic diver Tom Daley, 19, is dating Oscar-winning screening writer Dustin Lance Black, 39, and "doesn't care what people think" about the age gap, a source says Credit: Mike Marsland/Wireimage; Vincent Sandoval/WireImage

For his first boyfriend ever, Tom Daley has struck gold -- Oscar gold! As rumored, the British Olympic diver, 19, is indeed dating Dustin Lance Black, the 39-year-old screenwriter and LGBT activist, multiple sources confirm to Us Weekly. (The coupling was first reported by E! News.)

"It's true and they're very happy," a source close to the bronze medalist tells Us Weekly. Daley and the Oscar-winning Milk scribe have "been together since summer," the source adds.

Daley came out as bisexual to fans via his YouTube page on Monday, Dec. 2. "My life changed massively when I met someone, and they make me feel so happy, so safe and everything just feels great," Daley gushed. "That someone is a guy. It did take me by surprise a little bit," he continued, though he declined to reveal Black's identity at the time, noting, "I still fancy girls."

Of the 20-year age gap, the Daley source tells Us, "Tom told friends he 'doesn't care what people think.'"

And Daley is already making the most out of his boyfriend's writerly gifts: Another source tells Us that Black wrote the script for Daley's coming out video.