It seems that Leonardo DiCaprio and Blake Lively are making their romance public!

DiCaprio, 36, and Lively, 23, were spotted holding hands on a romantic, moonlit walk after dinner in Monte Carlo on May 27 following weeks of rumors and high-profile partying up and down the French Riviera.

The Inception actor, who just separated from long-term partner Bar Refaeli, seems to be moving on quickly.

“He had introduced Blake as his girlfriend. I would say they’re totally smitten!” an insider told US Weekly, while another witness described him as “very in love.”

Two days later, the Oscar nominee — who had been entertaining the Gossip Girl actress for weeks with dinners, helicopter and yacht rides, and flashy A-list bashes – invited her to a Grand Prix watching party onboard a yacht.

“Her face lit up when Leo was talking,” a partygoer observed.

He and his 23-year-old Gossip Girl love interest have been on an extended European vacation together, traveling from town to town, in recent weeks.

On Friday at twilight, the couple was seen making a hasty sprint to a hotel hand in hand, pausing only to chat with a porter on the door and several adoring bystanders.

The 23-year-old and Leo, 36, had left their hotel in Saint-Paul, France, separately earlier that day.

The two met in a NYC business meeting in November and kissed at a Hollywood gala in January.

“I’ve never seen him like this with a girl,” says a DiCaprio source.

Blake smiled and looked casual and comfortable in a grey sweater and sunglasses while Leo indulged in his smoking habit at the table.

Of course, for the most part, the aspiring actress flaunted her finest attributes – her legs – in revealing gowns, demonstrating why she’s been dubbed ‘leggy Lively.’