Casting for Ye Rishta Kya Kehlata Hai

Need following casting for New characters in Show :

1. Semi Known / Known male actor around 38 to 42 to Play Dad.
2. Semi Known / Known female actor around 34 to 36 to Play Mom.
3. Semi Known / Known male actor around 21 to 23.
4. Semi Known / Known male actor around 27 to 29.
5. Semi Known / Known female actress around 50 to 55.