Jennifer Aniston has "insanely frizzy" hair.

Jennifer Aniston

Jennifer Aniston

The 'Cake' actress' bought into hair company Living Proof after being impressed by how much their products were able to smooth her uncontrollable tresses.

She said: "I'm Greek so insanely frizzy hair is in my genes. We get good skin but a lot of frizz. I have a wave that can't decide whether it wants to be curly or not. Humidity is my biggest challenge, especially on location. I discovered the Living Proof No Frizz range on a humid summer shoot in North Carolina and was amazed at how smooth it left my hair. That's when I knew I had to get involved with the brand. And I always have Living Proof Perfect Hair Day Night Cap Overnight Perfector with me. It's an incredible cream you wear overnight, then wake up with shinier, more manageable hair, but I use it during the day too."

And the 47-year-old actress - who is married to Justin Theroux - is finding her hair has got thinner as she's got older.

She told Red magazine: "Hair gets finer and changes as we get older - that's a rude awakening.

"One day you notice that you have less hair than you did in your twenties, it doesn't have the same volume, and it doesn't respond quite as beautifully."

Despite her hair struggles, Jennifer has learned over the years how to make it look good without professional styling.

She said: "I don't have as many blow-dries as you might think - I'm quite good at it myself.

"I run some Night Cap through my hair, then I let it dry naturally for a bit. When I do start drying I use my hands first and only go in with my brushes when it's almost dry."