I like the green one least of all.
He's the relative I like (the) least.
- That must be the colour I like least in the whole world!
- If I only had one course and no drinks, I ought to pay least, surely?
- Marilyn is the least vain person I know - she's convinced she's ugly!
- Which of these outfits do you think cost least?
- Michael, you hardly got any notes right - it's easy to see which of you three has practised least this week.