Steal the Show

To attract the most attention and praise at an event

Cost an Arm and a Leg

Something that is very expensive

Long Story Short

Used to indicate that you are giving a brief summary

Don't Judge a Book by Its Cover

Do not judge something by its appearance alone

Step by Step

Gradually, one stage at a time

Cry over Spilt Milk

To be upset about something that has already happened and cannot be changed