Reese Witherspoon takes fashion advice from her daughter.

Reese Witherspoon

Reese Witherspoon

The 'Wild' actress admits 16-year-old Ava - her eldest child with ex-husband Ryan Phillippe - is "so much cooler" than she is and is in awe of her "cutting edge" sense of style.

She said: "She's so much cooler than I am!

"She's very cutting-edge and she knows a lot about fashion, and she has her own sense of style, which is amazing.

"We try to kind of confer about new styles. She tells me whether or not I can wear things."

The 40-year-old actress - who also has sons Deacon, 12, with Ryan, and Tennessee, three, with husband Jim Toth - admitted she always feels guilty whenever she's away from her family.

She told Us Weekly magazine: "[I feel guilty] every day, all day long. Every time I travel, it's very hard."

Reese is proud of the strong bond her children have and loves seeing the older kid helping her youngest son learn to read.

She said: "He's learning to read. And that's a really great thing, to have my older kids teaching my younger children how to read. Incredible memories that we're making."

The 'Legally Blonde' star celebrated her fifth wedding anniversary with talent agent Jim last month and thinks the key to their marriage is "sharing everything".

She said: "I think what's great about he and I is we're both the heads of our family and we share everything -- the responsibilities and the highs and the lows together.

"It's really beautiful to be on that journey with someone that you truly love and who truly respects you."