Robert Pattinson vs. Nicholas Hoult, Jennifer Lawrence's 'Ex' Steals Kristen Stewart AND Riley Keough? 'Equals' Actor Flirts, 'Twilight' Hottie Jealous?

Robert Pattinson and Nicholas Hoult are two of the hottest (and chillest) bachelors in Hollywood right now. So, what's up with all the love life drama - and how are both heartthrobs involved?

Rumors once suggested that R-Patz "romantically pursued" stunning 25-year-old model, Riley Keough (although such dating hype was later debunked by Lisa Marie Presley). But now it looks like 24-year-old Hoult wants a piece of the action!

First off - did J-Law and the "Warm Bodies" actor officially break-up? Apparently, yes. The "Hunger Games" starlet's "explosive ego" was allegedly too much for Hoult to handle...

"They're still talking, but Nicholas is moving on," reveals a supposed The Fix insider. "He hates how in love with fame Jen is, and he told her he hates dating an A-list actress. That was the most hurtful to Jen because she's worked so hard for her achievements and she's so proud of her career. But Nic wants a more low-key girlfriend and Riley fits the bill."

So, how does this involve Keough?

Another source for Page Six explains that the two were recently spotted "flirting" during a "cozy" dinner date a few weeks ago.

"They were sitting arm-in-arm in a booth with Adam Lambert and Charl Brown at No. 8's "Philo Prom" on July 23, the snitch said.

As for Pattinson's infamous ex-girlfriend, Kristen Stewart... are things getting hot-and-heavy on AND off-screen?

The "Twilight sweetheart stars as Hoult's "love interest" in the upcoming drama/sci-fi flick, "Equals." Check it out:

Kristen Stewart & Nicholas Hoult 'Romance' PHOTOS: Robert Pattinson's Ex Flaunts Tomboy Look For 'Equals' Movie, Jennifer Lawrence Jealous?

Pattinson seems to be enjoying the single life, but do fans think he might be a little peeved that Hoult's "stealing" his former flames?

Stay tuned...