He has been involved in making music since an early age.

She has been involved in music since a young age.

She has been working as a model since the age of 16.

She wanted to become a model ever since the age of 16.

You've been looking for a mother since the age of four!

They had known each other since the age of five.

She is 50 now, a mother since the age of 43.

She has had an interest in story telling since a very young age.

I have been doing that since the age of five which is 20 years now.

He had been with the club since the age of seven.