You want the fl to be famous or the ML?or both?
Female lead or can be both（≧∇≦）
Daytime star if you don't know abt it yet
https://www.mangago.zone/read-manga/daytime_star/
Okay so
https://www.mangago.zone/read-manga/imitation_park_kyung_ran/ (both are idols)
https://www.mangago.zone/read-manga/touch_your_heart/ (FL is an actress)
https://www.mangago.zone/read-manga/a_beastly_scandal/ (both are in the Film industry I think)
https://www.mangago.zone/read-manga/shadow_beauty/ (FL is a social media Star)
https://www.mangago.zone/read-manga/the_hip_guy/ (FL is a CEO, not exactly what you are looking for but I think this one is a cute and funny story)
https://www.mangago.zone/read-manga/delicious_scandal/ (FL is a singer, not a Very famous one though)
https://www.mangago.zone/read-manga/daytime_star/ (both are acting)
https://www.mangago.zone/read-manga/you_are_my_only_love/ (both are in the entertainment industry I think)
https://www.mangago.zone/read-manga/impossible_ng/ (again not exactly what you are looking for But they had to act together to "survive")
https://www.mangago.zone/read-manga/the_scandalous_proposal/ (I think both are acting)
https://www.mangago.zone/read-manga/can_i_bite_you/ (both acting + ML is a vampire)
Pls rec any idol or actor mangas, manhwas with female lead