1) Appearing to never grow old 2) Dick Clark, seemingly 3) Enduring 4) Eternal 5) Eternally young 6) Eternally youthful 7) Ever youthful 8) Ever-abiding 9) Everlasting 10) Forever young 11) Immemorial 12) Immortal 13) Immutable 14) Lasting 15) Lasting an eternity 16) Lasting forever 17) Like Dorian Gray 1) Eternal 2) Everlasting 3) Lasting 4) Permanent 5) Perpetual 6) Static 7) Unceasing 8) Unending 
Ageless is an adjective describing a person or thing whose age cannot be defined, is non-existent, or appears not to change. It can also describe something that has always existed without a precise beginning or an end. Agelessness can be used as a synonym for immortality; more specifically it refers to eternal youth. ==Ageless people== Agelessness...
• (a.) Without old age limits of duration; as, fountains of ageless youth.
Age'less adjective Without old age limits of duration; as, fountains of ageless youth. 
[adj] - continuing forever or indefinitely
aeonian adjective continuing forever or indefinitely; `the ageless themes of love and revenge`; `eternal truths`; `life everlasting`; `hell`s perpetual fires`; `the unending bliss of heaven`
not aging or appearing to age. · lasting forever; eternal; undying: the ageless beauty of Greek sculpture.