The day has almost arrived: Prince Harry and Meghan Markle will tie the knot Saturday in the royal-family-and-“Suits” mash-up we never knew we needed.

The couple will marry at St. George’s Chapel at Windsor Castle in front of family, friends and likely quite a few celebrities. Here’s everything you need to know about how to tune in:

When is the wedding?

The wedding ceremony will start at noon, London time. That means 7 a.m. Eastern. (All times after this are Eastern.)

When will the wedding be over?

Around 8 a.m. Afterward, Harry and Meghan go on a brief carriage ride around the castle to wave to the spectators.

Where can I watch online? 

Most coverage will start quite early in preparation of guests arriving at the chapel. Sometimes arrivals are the best part, as you’ll get to scope out the fashion (okay, the hats) and finally see which stars are in attendance. Among the many online options (you may need a cable log-in for some):

The Washington Post will begin streaming live coverage at 4 a.m., with commentary from Hannah Jewell — you can find it on our home page and on our Youtube channel. After the wedding, The Post will have clips showing what you missed.

CBS begins coverage at 4 a.m.; you can live-stream it here. Same with BBC America; stream it here.

PBS offers a live stream on its website at 4:30 a.m.

CNN will live-stream everything on its homepage and apps starting at 5 a.m.; will be streaming coverage globally.

Where can I watch on TV?

Starting at 4 a.m.: BBC America, CBS

4:15 a.m.: PBS

4:30 a.m.: NBC

5 a.m.: ABC, CNN, E!, TLC, Fox News Channel

7 a.m.: CNN en Español will simulcast CNN’s coverage

Starting at 7:30 a.m.: “Broadcast legends” Cord Hosenbeck and Tish Cattigan (also known as Will Ferrell and Molly Shannon) will offer their special brand of commentary on HBO.

What if I accidentally sleep through it?

No judgment here. HLN will re-air the nuptials at 3 p.m. Saturday, as will CNN at 8 p.m.

What should I watch ahead of the wedding to get excited?

At the last royal wedding in 2011, the extravagant hats worn by guests received almost as much attention as the bride and groom. London milliner Bundle MacLaren explains the tradition of British wedding headwear, and what makes some hats too lavish. 

Washington Post pop culture host Hannah Jewell visited London milliner Bundle MacLaren to try on some hats and learn about the tradition of wedding headwear. (The Washington Post)

One of Prince Harry’s wedding presents from his grandmother is a new royal title. Veteran royal-watchers are betting he will become the Duke of Sussex. Here’s a breakdown of what that means.

It's official: Queen Elizabeth II's wedding present to Prince Harry and Meghan Markle was to name them the Duke and Duchess of Sussex. What's that mean? (William Neff/The Washington Post)

Markle’s life has already changed a great deal since the engagement, but the most significant changes come after the marriage is official. Learn more about the expectations of royal life from expert and author Katie Nicholl.

Hannah Jewell interviews royal expert and author Katie Nicholl about what it will be like for Meghan Markle when she marries into the British royal family. (David Jorgenson, Hannah Jewell/The Washington Post)

What do black Londoners think about the royal wedding? Brixton is a South London neighborhood sometimes called “the black capital of Europe.” The Post asked people there if Markle’s race matters to them.

Brixton is a South London neighborhood sometimes called "the black capital of Europe." The Post asked people there what they thought of the royal wedding. (Will Wilkinson/For The Washington Post)

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