Reese Witherspoon's older children are "so in love" with her two-year-old son, Tennessee.

She said: "It's kinda great because my older kids are just so in love with their baby brother and help out so much. It's kind of like having this big extended family.

"We always talk about in our house, the more people that love you, the better your life is. I love it."

Asked what it's like being a mother to a teenager and a toddler at the same time, the 38-year-old Oscar winner told the 'Today' show: "It's interesting. Two different things are happening all the time."

The blonde beauty appears naked in 'Wild' - which is based on Cheryl Strayed's memoir about quitting heroin addiction with a gruelling 100-day hike - and previously admitted her daughter was both uncomfortable and proud of her performance.

Asked if Ava would watch the movie, she said: "Yeah, we talked about it. I said, 'Ava, I've got to tell you something, I'm naked in the movie, OK, lemme explain!' She's like, 'Mom, that's so weird!'

"I was like, 'I had to be brave and I couldn't just play the parts I was comfortable with. Cause Cheryl was brave enough to tell her whole story so I had to tell the parts that even I was scared to do.' She's proud of me."