VIDEO : Gwyneth Paltrow Shares Rare Selfie of Boyfriend Brad Falchuk on His Birthday

Gwyneth Paltrow doesn't share much about her longtime relationship with Brad Falchuk, but Wednesday night was a special occasion.

In celebration of the TV producer's 46th birthday, Paltrow posted a selfie to Instagram along with a sweet and simple message. "Happy birthday, handsome," she wrote.

Paltrow rarely talks about her boyfriend, but she explained in InStyle's January issue how Falchuk felt about her amicably co-parenting with ex-husband Chris Martin.