Prince Harry and Chelsy Davy vs. Prince William and Kate Middleton

Prince Harry/ Prince William: Photo Credit: Anwar Hussein/ WENNAnd while things appear to be heating up between the two lovebirds, Harry's older brother, Prince William, is taking his relationship with on-again/off-again girlfriend Kate Middleton to the next level as well.

After many breakups and makeups, the two couples have finally settled down and admitted that they've found love - but who will make it to the altar first?

William is two years older than Harry, which would likely indicate that he'll get married first.

But if there's one unique thing about Prince Harry, it's his unpredictable and impulsive actions. For all we know, Harry could be planning an engagement already!

Speculation of Kate and William tying the knot hit an all-time last year but the couple ended up taking a break instead.

Now that both couples are back together, which potential prince-to-be will ask for their girlfriend's hand in marriage first?

Care to place bets, anyone?