"My boyfriend is famous."

Translation: Ο φίλος μου είναι διάσημος.

[Lentilka_007]

Why is "δημοφιλής" incorrect?

[troll1995]

Δημοφιλής is popular, famous is διάσημος. For example, someone can be famous (well-known) but not popular (liked by the people).

[Lentilka_007]

aaaha, thank you

[troll1995]

If that helps you remember their difference διάσημος<δια (amplifing prefix) +σήμα (sign), δημοφιλής<δήμος (people)+ φίλος (friend)

[bonbayel]

Both were given as possibilities, and i think δημοφιλης was used for famous once, but i may be wrong.