Credit: KCSPresse/Splash News Online

Ooh la la!

Kristen Stewart and Rob Pattinson were spotted holding hands at a Paris airport on their way to London Tuesday night.

See more photos of Rob and Kristen holding hands at!

Their Twilight costar Peter Facinelli linked to the image on his Twitter page with a note: "Co-stars caught holding hands. Guess this picture proves everything."

The two have refused to confirm whether they're an item. Asked about rumors, Stewart, 19, recently told Entertainment Weekly, "I probably would've answered if people hadn't made such a big deal about it. But I'm not going to give the fiending an answer."

Pattinson, 23, couldn't help but sing Stewart's praises in November's Harper's Bazaar while promoting the latest installment of the vampire series, New Moon (out Nov. 20).

"She's a unique girl," he said. "You really don't meet many people like Kristen."

Stewart says she is aware they can heat things up on screen as Bella and sexy vampire Edward. During their audition, "We had a very responsive, palpable thing," she told the magazine.

Twilight director Catherine Hardwicke also tells November's Vanity Fair the two -- who spent the night together at Hollywood's famed Chateau Marmont on Oct. 29 -- share a "nervous attraction" that makes the film work.

"What Rob and Kristen had is a multitude of feelings for each other. Complex feelings for each other," Hardwicke said. "It was what we needed. Complex, intense fascination."