If you were born in 1990, you are 35 or 36 years old in 2026 (depending on whether your birthday has passed). Born in 1990 age: 36 years.
Born in 1990: you are 35 years old before your birthday in 2026, and 36 years old after. Generation: Millennial.
If born in 1990, you are 35 or 36 years old in 2026.
Born in 1990: Millennial.