Calming the nerves? Charlize Theron puffs on a cigarette as she 'returns to South Africa to re-shoot scenes for her film The Last Face with ex-fiancé Sean Penn'

Her ex-fiancé is currently shooting the final scenes for their film, The Last Face, in South Africa.

And it appears Charlize Theron will be heading to the film’s set to join work on the production as she was spotted out and about in her motherland over the weekend.

The 39-year-old actress cut a slightly solemn figure as she was seen puffing away on a cigarette on Saturday afternoon.

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Strictly business: It appears Charlize Theron will be heading to the film set to join Sean Penn on work for their film, The Last Face, in South Africa

Strictly business: It appears Charlize Theron will be heading to the film set to join Sean Penn on work for their film, The Last Face, in South Africa

The actress kept to herself at first as she sported a large black coat teamed with jeans and black ankle boots.

Charlize accessorised with a grey handbag and black shades, while she tied her blonde locks back into a bun.

The Mad Max star has not been seen with her former partner of 18 months, Sean Penn, following their sudden split earlier this year.

Calm: The 39-year-old actress cut a slightly solemn figure as she was seen puffing away on a cigarette on Saturday afternoon

Calm: The 39-year-old actress cut a slightly solemn figure as she was seen puffing away on a cigarette on Saturday afternoon

Puffing away: The actress kept to herself at first as she sported a large black coat teamed with jeans and black ankle boots

Puffing away: The actress kept to herself at first as she sported a large black coat teamed with jeans and black ankle boots

Sean, 54, arrived in South Africa a few days before to continue his directional efforts on The Last Face, which stars Charlize, as a doctor doing humanitarian relief work in Africa.

‘She meets another doctor, played by Javier Bardem, amid violent political conflicts in the region.’

Sean put out the 'Urgent Casting Call' saying: 'We are looking for a pregnant black woman who is about to give birth. We need the baby to be born around Saturday or Sunday (25th & 26th).’

While it is claimed that cracks first started to appear in Sean and Charlize's romance shortly after they returned to Los Angeles from filming their upcoming movie, his daughter Dylan insists the film is "a masterpiece."

Heading over: Charlize accessorised with a grey handbag and black shades, while she tied her blonde locks back into a bun

Hey there: The Mad Max star had not been seen with her former partner of 18 months, Sean Penn, following their sudden split earlier this year

Hey there: The Mad Max star has not been seen with her former partner of 18 months, Sean Penn, following their sudden split earlier this year

She told UsMagazine.com: "He just went back to South Africa [to do] reshoots for his movie that he did a couple months back. His life is this movie. I've seen pieces of it, and it's a masterpiece."

Dylan also insisted that she is on very good terms with Charlize, even though the 'Mad Max: Fury Road' star ended her relationship with Sean in May.

Asked about the Oscar-winning beauty, the 24-year-old model said: "She's the best. She's hilarious. She's very bold, in the best way."

Dylan, who is Sean's daughter with ex-wife Robin Wright, previously praised Charlize for being 'the only woman since my mom who can shut my dad up.'

Companions: Sean, 54, arrived in South Africa a few days earlier to continue his directional efforts on The Last Face, which stars Charlize

Companions: Sean, 54, arrived in South Africa a few days earlier to continue his directional efforts on The Last Face, which stars Charlize, as a doctor doing humanitarian relief work in Africa