Courteney Cox thinks David Arquette looks the "best he's ever looked".

The 46-year-old actress - who announced last October she and the actor were undergoing a trial separation after 11 years of marriage - is proud that her estranged husband recently received treatment in rehab for "alcohol and other issues" and can't believe the transformation in him.

She told US TV show 'Extra': "Oh my God, I'm so proud of him. Best he's ever looked! He's so cute that I'm like, 'Dude, I don't understand. Really?! Why are you that cute right now?' "

Courteney also revealed she and 39-year-old David - with who she has six-year-old daughter Coco - are able to get along better than ever, though she admits it is "weird" to be in a position of having to examine their relationship.

She added: "Our communication and the way we are, just learning about each other in a different way, it's smart.

"It's weird to be at this age and look at ourselves but it's hard and it's important and I'm glad we are, so I love him."

Meanwhile, David - who stars opposite Courteney in forthcoming horror sequel 'Scream 4' - says the pair are "working on" themselves in a bid to repair their damaged relationship.

He said in an interview with TV show 'Entertainment Tonight': "We're separated, we're working on ourselves and our relationship, and sort of figuring out what we want. You know, life's complicated and people go through changes.

"And I've been reading a lot of things about myself, reading books that talk about feelings and changes, and she's been working on herself a lot too. The great thing is that we really love each other and that we're really amazing parents together, very supportive - I'm her biggest fan and she's my biggest fan. You know, that's what it's all about really."