The 25-year-old rapper shared a photo of the "Keeping Up with the Kardashians" star along with a love message, reported Ace Showbiz.
"Certain things catch your eye, but only few capture the heart," the "Rack City" rapper posted.
Kylie, who is currently in London to promote new skincare brand Nip + Fab, also shared some pictures of her similar to one that was shared by Tyga.
The photos were taken when she visited the London Eye. The 17-year-old reality star wore an over-sized red satin coat over a black long dress with high slit. Wearing dramatic lashes and pink lipstick, she completed her look with a pair of suede thigh-high boots.
Although Tyga kept denying that he's dating Kylie, rapper Kanye West seemingly confirmed Tyga and Kylie's relationship during a radio interview last month.