The half-sister of Prince Harry's girlfriend Cressida Bonas is getting married to her musician boyfriend Alan Pownall. Will the British royal be next?

Pownall, 28, is the lead singer of electronic band Pale, and he proposed to model-turned-actress Wilde, 24, after four years of dating, The Daily Mail reports.

Earlier this year, Wilde's sister Isabella Calthorpe married Sam Branson in South Africa, My Daily reports.

Are Prince Harry and Cressida Bonas next to get engaged? Brits would probably be ecstatic to celebrate another royal wedding, especially after the birth of Prince George and the worldwide popularity of Kate Middleton after getting engaged and then marrying Prince William.

According to Fashion & Style, bookies are betting that a proposal between Harry, 28, and Cressida, 24, will happen before the end of 2013!

The couple is reportedly living together already: "She went back to London with Harry on the train and has been staying at his apartment ever since," a source said last month, after the duo attended their friend's wedding.

Harry and Cressida are "definitely more in love than ever," a source said, Fashion & Style reports. "I would not be surprised if she's the one he marries."

"They are very affectionate with one another when they are with their friends," the source continued.

"They kiss and cuddle and just seem head over heels for one another. They both have the same sense of fun and adventure. They're on the same wavelength. They are so compatible."

However, Harry recently said that "the pressure's off" for him to settle down and produce an heir to the British throne, after Prince William and Kate Middleton gave birth to Prince George. It might be possible that Harry is not in a huge rush to tie the knot just yet anymore.