Robin Wright jokes she wears Spanx ''to hold the bakery in''.

The 'House of Cards' actress is a huge fan of the body shaping undergarments, which help her to always achieve a svelte figure for the red carpet.

Speaking to People.com at the Los Angeles Confidential party earlier this week, she said: ''I have Spanx on. Always! I have to wear them all the time!''

Although she is a fan of Spanx, the 48-year-old beauty - who is engaged to actor Ben Foster - also spends plenty of time working out.

She added: ''I ran on the beach this morning. Running gets everything done, doesn't it? Covers it all.''

Robin has also been trying to keep to a strict diet as she gets ready to film the next season of 'House of Cards'

She said: ''I'm trying to do the paleo diet. No carbs. I've got to get thin for the show.''

Unlike many Hollywood stars, Robin says she has so far resisted plastic surgery to make her look younger.

She explained: ''I was really considering that stuff, because in Hollywood the pressure's there. You better lift that face and pump those lips and hike those boobs! And I was like, 'I don't want to do that. I'm going to get older. I'm going to have wrinkles!' ''

Although she didn't opt for surgery, Robin has previously admitted she has ''the tiniest sprinkle of Botox twice a year.''