He is a master of transformation on the big screen.

And off screen, Robert Downey Jr. loves to experiment with fashion, as evidenced by his latest unique ensemble which the actor showed off earlier this week in Brentwood, California.

As the 56-year-old actor met with friends for lunch in the upscale Los Angeles neighborhood, he turned heads with his quirky outfit which consisted of brown wide-leg pants and a green pinstripe blazer with brown sleeves. 

Eccentric: We take a look back at Robert Downey Jr.’s fashion statements over the years after the actor stepped out in another unique look on Thursday

Under his jacket, the Iron Man star wore a matching green T-shirt with a circle pendant around his neck. He also accessorized with some brown tinted sunglasses with metallic trim. 

His latest look got fans speculating that the star was dressed for a new movie role, however, it’s not the first time the Dolittle star has had tongues wagging over his fashion choices.

Dailymail.com is taking a look back at the star’s most interesting red carpet looks over the years from the actor who has never been afraid of bright colors or bold patterns. 

1988: The young actor – around 23 here -wears an oversize plaid suit as he heads to a fundraiser in Los Angeles

1989: The actor, seen here with girlfriend Sarah Jessica Parker, teamed a striped jacket with some Capri pants at the Ghostbusters II premiere

1994 and 1995: The actor was fond of mixing formal pieces with more relaxed layers

1998: Robert chats to Jared Leto while sporting a sheer shirt and silver suit

2005: The Sherlock Holmes star is pictured leaving the Late Show with David Letterman in NYC missing citrus orange and green

2006: During press events in Park City the star injected lots of color into his outfits

Meanwhile, Robert is set to star in The Sympathizer adaptation.

The 56-year-old actor will take on a supporting role in the new series from HBO and A24, which is based on the 2015 novel from Vietnamese American professor Viet Thanh Nguyen, which won the Pulitzer Prize for fiction.

The Wrap reports that a worldwide casting search is underway for the Vietnamese lead role.

Downey Jr. will play multiple supporting roles, including those of a congressman, a CIA operative and a Hollywood film director.

As well as acting in the series, Downey Jr. will also take on the role of executive producer.

2007: Here the Iron man star is seen experimenting with a blond look

2010: Robert opted for a futuristic goth look at the Guys Choice Awards in Los Angeles

2013: Robert showed up to a photo call for Iron Man 3 in a Lederhosen-inspired outfit

2013: The actor showed off a clean-cut look with power blue pinstripe jacket

Park Chan-wook will direct, executive produce and serve as co-showrunner with Don McKellar.

The Sympathizer novel follows a half-French, half-Vietnamese man, who is serving as a spy for the Communist forces in the final days of the Vietnam War.

The novel is written as a confession by the narrator to a mysterious commandant, who is holding him prisoner.

A sequel, titled The Committed, was published on March 2, 2021.

The Sympathizer is one of Downey Jr’s first big projects since he wrapped up his role as Iron Man / Tony Stark in Marvel’s Iron Man and Avengers movie franchises. 

2020: At a Dolittle special screening in London, the 56-year-old sported tiger stripes on the sleeves of his long coat layered over a mauve suit with red scarf