Kate Walsh dressed to impress as she attended the Telethon fundraiser with her new fiancé Andrew Nixon in Perth on Saturday.

The Grey's Anatomy star, 55, stunned in a strapless long lime green dress, which featured a high slit, as she made her way to the event.

The American actress completed her look with strappy heels and couldn't wipe the smile off her face as she walked alongside Andrew.

Kate also held a silver bag and wore statements earrings for the event.

She tied her long brunette locks into a high bun and opted for a neutral palette of makeup.

Meanwhile, Andrew looked dapper in a black tuxedo, white buttoned shirt, bow tie and black shoes.

Kate recently revealed she secretly got engaged to Australian farmer Andrew during an Instagram Live she did with Amy Brenneman.

'Here comes the jungle cat, that is my fiancé,' the beaming bride-to-be announced earlier this month from their Perth home.

Brenneman replied: 'She just 100 percent outed your engagement!'

'I did, I just outed our engagement,' Kate confirmed, prompting Andrew to respond: 'Awww.'

Kate and Andrew later kissed each other on camera to the delight of her fans tuning into the 38-minute online chat. 

The California born, Arizona raised actress reportedly met the Nixon Farming staffer on a cruise just before the start of the coronavirus pandemic in early 2020.

The Nixon family have been farming predominantly malt barley and canola in the Moora/New Norcia area of Western Australia for close to 100 years, according to the website.

This will be the second time down the aisle for Kate, who ended her 15-month marriage to Day Shift executive producer Alex Young in 2010.

At the time, the showbiz couple - who legally separated 2008 - cited the celeb favourite 'irreconcilable differences' as the reason for the split.