please help me translate this.

Hi there,
Please help me.

"the 29-year-old has been dancing professionally for 10 years"

Does this sentence mean,

・this dancer is 29 years old and 10 years has passed since he`s started it.

or

・He`s been a dancer for 29 years and a pro for 10 years ??

What I`d like to know is how old he is.

Thanks in advance.

- The dancer is 29 years old
- 10 years have passed since he started dancing professionally.

Thank you very much!
It helped