Meanwhile, another snippet shows the former Suits star getting overwhelmed on her wedding day.
"I just feel like I'm pretending to be this beautiful swan," Smith's Meghan Markle says in the clip.
The sequel follows the previously aired Harry & Meghan: A Royal Romance, which tracked the couple’s whirlwind courtship.
"Beyond blending their families and cultures, Harry and Meghan's core values are put to the test as they try to find the balance between honouring Royal tradition and staying true to their beliefs," Lifetime said in a press release.
The cast of the movie also includes Jordan Whalen as Prince William, Laura Mitchell as Kate Middleton, Maggie Sullivun as Queen Elizabeth II, Timothy Temple as Prince Philip, Charles Shaughnessy as Prince Charles, Deborah Ramsay as Camilla Bowles, Natalie Moon as Layla, James Dreyfus as Leonard and Bonnie Soper as Diana.