As all eyes in Cambridge travel to Cressida Bonas' ring finger for news of a royal proposal, it has been reported that Prince Harry's girlfriend is helping the royal to settle down.

Cressida Practically Living With Prince Harry?

It's no secret Prince Harry was once known for his party boy lifestyle, which included an infamous photo leak of him playing strip billiards in Las Vegas back in 2012. Since then however, it seems like he has calmed down quite a bit, and he has his girlfriend of two years to thank for that.

A source told In Touch Weekly in this week's issue of the magazine, "He's calmed down a lot since then. Harry no longer wants to be seen as the Playboy Prince. He wants to prove to Cressida how serious he is about her...No one can believe how Cressida has tamed Prince Harry. It would have been unthinkable a year ago."

Cressida 'Not Ready' To Get Married?

The newest speculation of their possible upcoming engagement claims that the royal will propose to the 24-year-old beauty this summer. She still has yet to visit the Queen's 49,000 acre Sandringham estate with the Queen present, but that's said to be changing around the same time of Prince Harry's planned proposal.

Still, Bonas's alleged uncertainty of joining the royal family has made Prince Harry even more attracted to her.

The source added, "She blew hot and cold and kept changing her mind about whether she could handle being a part of the royal circus. It just made Harry even more keener."

In the meantime, she has been invited to tag along with Prince Harry to a formal dinner at St James's Palace on March 27, indicating that a royal wedding could be in the works.

A palace insider told the magazine, "An invitation such as this often signals that the guest is considered a royal bride-to-be."

Tags: Prince Harry Cressida Bonas royal couple Prince Harry Girlfriend 2014