Now Playing: Royal wedding headwear

Now Playing: Windsor Castle chefs prepare for royal wedding

Now Playing: These adorable royal wedding kid guests made us smile

Now Playing: These royal wedding dresses changed fashion history

Now Playing: Our favorite royal wedding fascinators worn by famous guests

Now Playing: How Meghan Markle breaks the mold as royal bride

Now Playing: How Harry, Markle cope with the spotlight

Now Playing: Exploring Windsor before the royal wedding

Now Playing: Security increased for Harry and Markle's wedding

Now Playing: Meet 2 people invited to watch the royal wedding on Windsor Castle grounds

Now Playing: What to expect for Meghan Markle's wedding dress

Now Playing: Sneak peek of Markle, Harry's wedding cake

Now Playing: How Meghan Markle's high school is celebrating the royal wedding

Now Playing: Pro polo player on attending Prince Harry's wedding

Now Playing: Royal fans flock to Windsor for Harry, Markle's wedding

Now Playing: A look back at how Harry met Meghan

Now Playing: Hawaii volcano eruption sends ash in air

Now Playing: At least 2 dead in school bus crash

Now Playing: Rain, flooding pound the East Coast

Now Playing: Trump responds to North Korea's summit threat