Robert Pattinson and Riley Keough are reportedly dating, but it's been a while since they have been spotted together. Riley was seen walking through the streets of Hollywood alone Thursday night.

Riley Keough was spotted walking out of a popular Hollywood hotspot without her boyfriend Robert Pattinson, Perez Hilton reports. She was looking very casual, wearing no makeup and with her long, curly red hair down and un-styled. She was wearing gray leggings, a pink hoodie, and white sneakers.

In the photo, she looks cheeky as she smirks at the photographer.

Perez Hilton wonders: where's RPatz?

According to recent reports, the "Twilight" star had flown to Los Angeles the day before, after taking a quick break from filming his new movie "Map to the Stars" in Toronto, Canada. We are surprised that he isn't hanging out with Elvis Presley's granddaughter.

Then again, recent reports have said that Rob sees Riley more as a "friend with benefits" than a girlfriend.

"With his schedule and his overall trust issues with girls due to his celebrity and what Kristen did to him, he and Riley are nothing more then friends with benefits," a source close to Rob told HollywoodLife.com.

"He considers himself single, but acts like a couple when he is around her," the source added.

On July 22, Rob was spotted kissing a mystery brunette after having dinner in Toronto.

Maybe that explains Riley's lonely romp through Hollywood.