Colin Firth starred in Bridget Jones's Diary (Romantic comedy Film)Bridget Jones's Diary (Romantic comedy Film) is starring Shirley Henderson
[Human]: Could you recommend movies starring Colin Firth? [Assistant]: He a great actor and has been in a number of movies. Is there a certain genre that you are looking for? [Human]: I know that he starred in Mamma Mia!. Can you suggest something similar? [Assistant]: Sure. If you are looking for romantic comedies then you could check out Hope Springs or my favorite Bridget Jones's Diary. [Human]: I've seen Bridget Jones's Diary also starring Shirley Henderson and Honor Blackman. Can you tell me who starred in Hope Springs? 
Renee ZeIlweger is great in that movie as well. I actually don't remember who else is is Hope Springs. Sorry. 