Anthony LaPaglia has found love again, confirming his engagement to his much younger girlfriend, Alexandra Henkel.

The Australian actor, 58, and Ms Henkel, 28, began dating in 2015, around the same time LaPaglia split from his wife of 17 years, Gia Carides.

The newly engaged pair made their public debut on Thursday at an event in Melbourne, with Ms Henkel showing off her large diamond engagement ring.

Carides and LaPaglia, who is best known for his role in US TV show Without a Trace, share custody of their 15-year-old daughter, Bridget.

LaPaglia filed for divorce from Carides, 52, in April 2015, citing irreconcilable differences.

The actor shot down suggestions his marriage had “failed” in an interview with the Herald Sun last year.

Alexandra Henkel shared a photo of her engagement ring on Facebook. Photo: Alexandra Henkel/Facebook

“With each age bracket you hit, whether you realise it or not, you’re evolving into who you are,” he said.

“And sometimes in a relationship they line up and sometimes they go in opposite directions.”

While his and Ms Henkel’s 30-year age gap is notable, it’s not remarkable by Hollywood standards.

Here are five other couples for whom age is just a number.

Catherine Zeta-Jones and Michael Douglas

These Hollywood heavyweights have been married for 17 years and have 25 years between them. Zeta-Jones is 47 and Douglas is 72.

Sarah Paulson and Holland Taylor

American Horror Story star Paulson, 42, and her actress partner, 74, are 31 years apart.

Harrison Ford and Calista Flockhart

At 74, the Star Wars actor is 22 years older than his wife of seven years, who is 52.

Mary-Kate Olsen and Olivier Sarkozy

The 30-year-old former Full House star is not only 17 years younger than her 47-year-old French banker husband, she’s also 33 centimetres shorter than him.

Aaron and Sam Taylor-Johnson

The 26-year-old British actor met his wife, who is 23 years his senior, on the set of the 2009 movie Nowhere Boy, which she directed.