Could it really be finally happening? According to Meg Ryan, the reunion we've been waiting three decades for is now confirmed, and we couldn't be more excited.

Taking to instagram, Meg shared a photo sitting alongside her When Harry Met Sally co-star, Billy Crystal with the caption, "It’s finally happening, we’re reuniting for something iconic." Cue excited hysteria from fans - including us.

While Meg is keeping the full details of the mysterious new project close to her chest, here's what we're predicting could be in the works, based on what we know so far.

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Will there be a When Harry Met Sally 2?

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Whether Meg and Billy's reunion will be a feature-length When Harry Met Sally 2 film is yet to be revealed, but we know that there is definitely a new project from the duo confirmed.

There is also speculation that, while the reunion may not be a full sequel, we may see some questions answered in a shorter clip revisiting the characters, as part of something wider (think the Love Actually reunion for Red Nose Day). With the Superbowl coming up, there is a chance they could be taking part in a special commercial where they revive their characters, and perhaps reenact some of the film's famous scenes or lines. We'll keep you posted as we find out more details!

What will happen in When Harry Met Sally reunion?

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At the end of Nora Ephron's original movie, we see Meg and Billy finally admit their feelings for each other, and marry three months later. We'd love to find out what happened next in their iconic friends-to-lovers romance.

If a new film were to visit them three decades later, would we meet their potential children or perhaps even grandchildren? Will we see them driving their kids to the University of Chicago - the college they met driving back from together?

Given the will-they-won't-they nature of their relationship for much of the first film, will they even still be together? And surely, there is going to have a be a nod to that restaurant scene? So many questions!

Who will be in When Harry Met Sally 2?

All that Meg Ryan has revealed in her post so far is that she and Billy Crystal are definitely reuniting and, presumably, reprising their roles as Sally Albright and Harry Burns. But who else might we see return from the 1989 classic - whether it's a full sequel, short clip or commercial?

Might we see or hear more from any of the couple's exes - Amanda, Joe or Helen? Sadly, Bruno Kirby, who played Jess, and Carrie Fisher, who played Marie, have since passed away, but it could be that the friends are referenced during the reunion, so we may still find out more about what has happened to their characters since.

When is the When Harry Met Sally reunion?

As of yet, there's no official release date for the follow up, but Meg Ryan did say in her post announcing the new project that she and Billy couldn't, "wait to show you all soon." Of course 'soon' could mean a number of things, but we're predicting we'll find out more details in the coming weeks. We'll keep you posted as soon as we know more!