TRUE love can last a lifetime -- but sometimes it takes a lifetime to find it.

Marjorie Hemmerde, 106, and Gavin Crawford, 73, are the doting pair who've proved it's never too late to fall head over heels for that special someone.

They met in a nursing home three years ago where both expected to quietly enjoy their twilight years.

Neither had ever been married and never expected such a lovely twist like this.

Now they are inseparable.

They're the kind of sweethearts who exchange glances and cheeky pecks like teenagers on a train.

"We just sort of melted into each other," Ms Hemmerde said. "We get along like old friends, the age gap doesn't seem to matter."

The relationship was the cherry on top for the former librarian who, at 96, decided to take her first overseas trip and became the oldest person to ever kiss the Blarney Stone in Ireland.

But it's the stolen kisses since that have really made this lady sparkle.

Mr Crawford said he'd found his princess.

"Marjorie is very outgoing and has good outlook in life," he said.

"She is always very cheerful and appreciative and we laugh together all the time.

"I think we both have learned that life is far too short not to enjoy it."

But the thought of making the union official is a fickle thought for the elderly duo, who learned long ago that marriage wasn't the only ingredient for a great life.

"I'm too irresponsible," Ms Hemmerde said. "I quite like living in sin."

Kew Gardens Aged Care social life manager Vicki Fraser said watching the relationship blossom had been heartening.

"That they found each other is beautiful," Ms Fraser said. "It's so positive for them both and so genuine. It proves it's never too late."