Could I wear shirt and jacket with jean and sport shoes for seeing musical show

Question:I will go to Sydney in December as a tourist. I have a ticket for Miss Saigon (Lyric Theatre) and Billy Elliot (Capital Theatre), both of them are evening shows.
I am not sure whether I should wear formal suit or rather casual wear as I describe above because it is not comfortable for me to bring suit and a pair of formal shoes for my trip.

Best Answer - Chosen by Asker: I will go to Sydney in December as a tourist. I have a ticket for Miss Saigon (Lyric Theatre) and Billy Elliot (Capital Theatre), both of them are evening shows.
I am not sure whether I should wear formal suit or rather casual wear as I describe above because it is not comfortable for me to bring suit and a pair of formal shoes for my trip.

you CAN wear whatever you want. More than likely though, the majority of people will be dressed up. Call the theater to check.

Absolutely not you scruffy person :-)

Yes Of Course !!!!!!!!!!!!!!!!!!!!!!!!!