We are as different as chalk and cheese.
We are like two peas in a pod.
We get on like a house on fire.
She is the spitting image of her mother.
I have little to do with her.
You just can't tell them apart.
I am very close to my twin sister.
I have a lot in common with my brother.
I get on really well with my cousin.
I take after my mum.
I look like my dad.