Flame-haired Sienna Miller wraps up in padded coat as she films new period drama in Northern Ireland

By MailOnline Reporter

Published: 12:39 EST, 18 September 2015 | Updated: 15:34 EST, 18 September 2015

She is usually seen looking glamorous.

But there was little sign of that for Sienna Miller when she was spotted on the set her latest movie project in Northern Ireland, this week.

The screen star, 33, was dressed for winter in her floor-length padded coat while shooting scenes for The Lost City of Z on Friday.

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Dowdy: Sienna Miller was dressed for winter in her floor-length padded coat while shooting scenes for The Lost City of Z in belfast's Botanic Garden on Friday

Dowdy: Sienna Miller was dressed for winter in her floor-length padded coat while shooting scenes for The Lost City of Z in belfast's Botanic Garden on Friday

Spotted in Belfast's Botanic Gardens, the acclaimed star added to her dowdy style with a pair of Victorian ankle boots and long-sleeved lace dress.

Wearing her hair up in an elaborate bun, she looked older than her years. 

Today's filming was set inside one of the huge glass houses in park, which saw hundreds of fans gather outside to catch a glimpse of the cast. 

Retro: The star added to her dowdy style with a pair of Victorian ankle boots and long-sleeved lace dress

Retro: The star added to her dowdy style with a pair of Victorian ankle boots and long-sleeved lace dress

The movie, set in 1925, tells the tale of legendary British explorer Percy Fawcett, who ventured into the Amazon jungle in search of a fabled civilization - but never returned.

Joining Sienna in the project is Charlie Hunnam, Tom Holland, Robert Pattinson and Sienna Buck.

As if that wasn't enough, the film is produced by Hollywood movie star Brad Pitt and producers Anthony Katagas, Marc Butan and Glenn Murray.

Step back in time: The movie, set in 1925, tells the tale of legendary British explorer Percy Fawcett, who ventured into the Amazon jungle in search of a fabled civilization - but never returned

Step back in time: The movie, set in 1925, tells the tale of legendary British explorer Percy Fawcett, who ventured into the Amazon jungle in search of a fabled civilization - but never returned

After that, Sienna will next play Ben Mendelsohn's on/off girlfriend Simone in the gambling drama, Mississippi Grind.

Ryan Reynolds and Alfre Woodard join the Australian 46-year-old in the flick, which hits US theaters September 25 and UK theaters October 23.

Sienna also reunited with her American Sniper leading man Bradley Cooper to play his love interest in the chef dramedy Burnt. 

In character: Charley Hunnam in Belfast's Botanic Gardens as The Lost City Of Z continues to be filmed

In character: Charley Hunnam in Belfast's Botanic Gardens as The Lost City Of Z continues to be filmed

Fan-tastic: Movie-goers flocked to the site in the hope of catching a glimpse of the actors and actresses

Fan-tastic: Movie-goers flocked to the site in the hope of catching a glimpse of the actors and actresses

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