- Amitabh Bachchan, Rajesh Khanna, Jeetendra – all born in 1942
- Shahrukh Khan, Aamir Khan, Salman Khan – all born in 1965
- Kajol, Karishma Kapoor, Preity Zinta, Hrithik Roshan – all born in 1974
- Dilip Kumar (Dec ’22), Dev Anand (Sep ’23) and Raj Kapoor (Dec ’24) had a max gap of 2 years between them.
Interesting initial data… seems worthwhile to explore!