By Kat Giantis
As per standard Hollywood split protocol, they "remain friends."
Word of the bust-up comes a little more than a month after the starlet, 24, trekked to Australia for the weekend to see the A-lister, 36, on the set of "The Great Gatsby."
That journey was the latest in a long line of frequent-flier-accumulating trips for the twosome, whose hot and heavy romance kicked off at the Cannes Film Festival in May and included stops in Italy, Santa Barbara, New York, Los Angeles and Disneyland.
And by most accounts, Leo and Blake seemed to be getting serious, with the actor reportedly impressing her dad with a comic book-related gift, and pals gushing that they're "so smitten, it's crazy."
One insider even predicted an impending engagement, a bet that we hope didn't have money riding on it.
Lively, however, isn't sitting home playing "Titanic" over and over again. Seems she has been seen in the company of her "Green Lantern" co-star, Ryan Reynolds.
According to the Boston Herald, the pair took the train together from New York to Boston over the weekend (the actor is filming "R.I.P.D." in Beantown), and they were seen dining at a local sushi joint.
As you ruminate on the possible implications of their dinner and travels a deux, let's take a quick look back at Leo and Blake's short but memorable romance ...
Like us on Facebook?
UP NEXT'Best night'
From Crowd Ignite