Diane Keaton's 25 best looks

There's an effortlessness to Diane Keaton's best looks that she has cultivated during five-plus decades in the spotlight. From awards ceremonies to showbiz events, she has wowed on the red carpet in adventurous looks featuring sleek belted suits, voluminous layering, a neutral colour palette and swathes of gingham.

Keaton's career began in the Broadway productions Hair and Play It Again, Sam in the late 1960s, with her first major film role coming in 1972's The Godfather. The star then appeared in several films produced by Woody Allen - her former partner - from the 1970s. In the decades that followed, she was cast in big-screen hits such as Reds, The First Wives Club, Something's Gotta Give, Father Of The Bride and Book Club.

The star, who is a mother to two adopted children, became known for her unique fashion sense in the 1977 film Annie Hall, for which she won an Oscar for Best Actress. Her character's wardrobe featured predominantly vintage men's clothing, including fedora hats, baggy trousers and ties. Since then, she has been considered an androgynous style icon, and some have credited her with making trousers suits a popular look for women.

Some core components thread together Keaton's go-to outfits. The Hollywood stalwart favours black, white, grey and beige shades, and classic prints like gingham, polka dot and tartan. Additionally, the actress knows how to style a trouser suit for any occasion, is a fan of a chic turtleneck and isn't afraid to play around with silhouette proportions. She also elevates her looks with cool accessories, frequently stepping out in oversized belts and bowler hats.