Riley Keough and Alex Pettyfer back on?

Riley Keough

Riley Keough and Alex Pettyfer are rumored to be back together.

The couple got engaged just six months after making their relationship public in October 2011 only to split up the following year.

Now it seems the pair may be back on.

Riley, 24, and Alex, 23, both attended the Los Angeles premiere of Lee Daniels’ The Butler on Monday.

She was apparently looking very close to her Magic Mike co-star.

“There was definitely warmth between Riley and Alex,” an onlooker told Us Weekly.

“They were laughing together and smiling at each other,” the source continued.

Another party-goer claims the couple was not shy about the fact they were together.

Apparently they were “holding hands” in a VIP area of the event.

Riley also had jewellery on her left ring finger, suggesting the pair may have changed their minds about calling off the engagement.

“They definitely came together,” the insider claimed.

Riley, who is the granddaughter of the late singer Elvis Presley and the daughter of Lisa Marie Presley, is said to have been besotted with Alex when they first began seeing each other.

Reports at the time alleged they couldn’t get enough of each other as their relationship blossomed.

“They have been inseparable since they started dating,” a source told Us.

Since ending her romance with Alex, Riley has been linked to Twilight Saga hunk Robert Pattinson.

Although they have been friends for some time, the duo were believed to be “hanging out and hooking up” when Robert split from Kristen Stewart earlier this year.

Riley and Kristen appeared together in The Runaways flick. Apparently the actor was smitten with the redhead.

“She’s the first girl he’s liked since Kristen,” one insider told Us at the time. “[They're] having a lot of fun.”

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