Katy Perry and Robert Pattinson have once again sparked dating rumors as the couple was reportedly spotted getting quite intimate with each other and even kissing at an after-party for "The Rover" premiere.

The 28-year-old actor was at the event for his latest film, taking place in Los Angeles on June 12. "Rob was his usual charming self, greeting a sold wall of fans on the red carpet," a source said to Radar Online. He then skipped the screening of the new movie and headed over to a party at the W Hotel to hang out with the 29-year-old pop star instead.

"When Rob saw Katy his eyes lit up," the eyewitness said. "She looked gorgeous in a lace sequin black mini-dress, and they hugged and kissed." Although the "Twilight" star was surrounded by a bunch of beautiful women, his eyes were completely set on the "Dark Horse" singer. "At least 10 hotties were hovering around Rob, but his focus was on Katy," the source said. "He kept kissing her the entire night."

Perry and Pattinson were "all over each other" throughout the night, even at around 12:30 a.m., when the party was winding down. "When Katy got up from a sofa that was in front of a fireplace, Robert walked over to her," the source said. "They kissed and hugged again. They were clearly trying to stay under the radar, but they couldn't help showing their feelings."

Similarly, another eyewitness revealed to Page Six of the two flirting with one another. Once Katy Perry showed up to the venue, Pattison reportedly told one of his friends that she was "so [bleeping] hot."

However, the previous reports contradict what a source told Hollywood Life: "Katy arrived and went over to Rob and they were hanging out. Once the buzz started that she was there and once she wasn't getting the attention from Rob that she thought she should be getting, she went outside and hung out with a girlfriend for the rest of the night. She was mad that he wasn't giving her the time of day that she thought she deserved."