The 25-year-old singer hates to wear a ring around his fingers, but Hardwick, 24, says the pair will not exchange vows until he agrees to wear a wedding ring, reported Contactmusic.
"Marriage is definitely on the cards, but I don't know when. Tom told me he can't wear a wedding ring because he hates anything around his fingers or neck, so I told him I won't marry him until he agrees to wear a ring," she said.
She intends to have an intimate wedding ceremony.