Harry and Megan are set to tie the knot on May 19 in what is being billed as the society wedding of the year.
The Lifetime movie about their romance will air in May in the UK and US. No Australian air-date has been announced.
Former Suits star Markle is no stranger to made-for-TV movies, having starred in two for US TV network, Hallmark.
“I think Hallmark is such an amazing network to work for,” Marke said previously, according to Vulture.
“It’s really heartwarming and affirming and validating. Especially in this day and age, it’s so nice for families to be able to all watch programming together. With stories like this, it keeps it really light and easy. And it makes everybody feel good. At the end of a long day, that’s what I want to watch!”