Oliver Appleby and Sarah Delf, both 24,  died at the scene of the crash on the A140 at Yaxley, Suffolk just before 20:30 GMT on 15 November.
In a statement, the families described them as "popular" and said they were "devoted" to each other.
The couple from Norwich were driving a blue Mazda which collided with a lorry. The lorry driver had minor injuries.
In a statement, Miss Delf's family said she was a "much loved daughter, sister, adored member of the family, devoted girlfriend to Oliver Appleby, and a dedicated friend to many".
"Sarah was beautiful in every sense of the word," the family said.
"She loved life, and lived hers to the full.
"Our hearts feel empty because she has gone but resonate with the love we shared for her and the lasting memories she has left behind."
Mr Appleby's family said; "He was a bright, enthusiastic young man with a heart of gold.
"He always put others first and doted on his beautiful girlfriend Sarah.
"Spending five happy years together, they were inseparable."
Tributes have been paid to an "inseparable" couple who died together in a road collision.