Reese Witherspoon is ''very grateful'' for her 20-year acting career.

The 'Wild' star took to Instagram to reflect on her two decades in the movie industry and how much she has enjoyed ''travelling the world and learning about other people's lives''.

Captioning a picture of herself from the 1990s, she wrote: ''This was taken in 1996, when I just started working in movies. It was one of my very first photo shoots ... I was beyond excited to have the chance to work in film.

''20 years later, I still am. I love being an actor, traveling the world, and learning about other people's lives. Feeling very grateful for my amazing job! #TBT #90sFashion (sic)''

Meanwhile, Reese previously reflected on how she is often the ''only woman on a set full of men''.

She said: ''So often I'm the only woman on a set full of men. It became this really interesting group of women whose work I'd always loved. Getting to work with them every day was a pleasure. I learned so much from each of them.''

And Reese also gushed about how she has ''always looked up'' to her 'Big Little Lies' co-star Nicole Kidman

She added: ''We didn't know each other very well before we started but I just always ... I always looked up to you. You're such an incredible actress.''

And Nicole shared: ''I call myself your big sister now ... I'd never had the experience of working with another woman so closely that I got to call you and say, 'What do you think I should do with this character? I don't like this scene and I don't know how to play this.''