The special will air ahead of the forthcoming spin-off series The Split Up.
Following the success of three series of The Split, the hit legal drama will be returning to BBC One to explore the themes of love, legacy, and modern marriage, through a sparkling cast of characters that audiences know and love.
The hour-long episodes will revisit the world of the Defoe sisters and their families as Toby Stephens joins as hot-shot family lawyer Archie Moore, alongside returning cast members Nicola Walker, Stephen Mangan, Fiona Button, Annabel Scholey and Deborah Findlay.
The final series ended with Hannah and Nathan attempting to divide up their twenty years together, and trying to navigate their way through a “good divorce”, questioning whether that is even possible.
Two years on, formidable family lawyer Hannah Defoe, played by Nicola Walker, and her family are back and have gathered for a beautiful wedding at a magnificent vineyard, nestled in Catalonia’s wine region.
Set across one sun soaked weekend, The Split will encompass break-ups, reunions and like all good weddings, plenty of romance. As the sun rises over the glorious Spanish countryside, Hannah is compelled to banish the ghosts of her past and open herself up to the possibility of love again. Can she find the courage to take the leap into a new future?
Amongst a host of new characters including Toby Stephens as Archie Moore, cast confirmed to return for the Spanish extravaganza include Nicola Walker, Stephen Mangan, Annabel Scholey, Fiona Button, Deborah Findlay, Ian McElhinney, Kobna Holdbrook-Smith, Elizabeth Roberts and Alex Guersman.
Speaking about the two-part special, writer and creator Abi Morgan said "In a world of brutal break ups and tantalising make ups, the Defoe family are invited to a destination wedding of their own, promising all that audiences have grown to love about The Split."
"Problematic prenups, scandalous wedding crashers, and low flying marriage proposals, as rom com meets gone wrong, in a chaotic and riotous weekend that guarantees to crack open the heart, before the last of the guests have gone home."
To which Lindsay Salt, Director of BBC Drama added "We know The Split’s millions of fans found it hard to break up with the Defoes, so before we delve into the heady world of The Split Up we couldn’t resist an extra treat in the form of these exquisite, sun-drenched specials from the wonderful Abi Morgan."
Produced by Sister, The Split Special is written by Abi Morgan, directed by Giulia Gandini, produced by Jennie Fava and executive produced by Jane Featherstone, Lucy Dyke and Abi Morgan
Speaking about today's news, Sister Co-Founder Jane Featherstone and Executive Producer Lucy Dyke added "It is a joy to reunite with Abi and our wonderful Split team for this two-parter for the BBC One and iPlayer. We have missed the Defoe family and their messy, complex lives so we couldn’t be more excited to send them to beautiful Barcelona for a glorious, romantic weekend."
"In this chapter, Abi explores the often terrifying prospect of facing new romance after divorce and promises a rollercoaster of emotions along the way. And welcoming the brilliant Toby Stephens to our ensemble, as lawyer Archie Moore, it’s safe to say, sparks are going to fly."
The special will air ahead of the forthcoming spin-off series The Split Up.
The Split Special will return on BBC One