She may be forcibly separated from her multi-millionaire American talent agent boyfriend, Patrick Whitesell, due to the coronavirus pandemic.But Pia Miller was surrounded by friends and family as she rang in her 37th birthday on Monday night.The former Home and Away star stunned on the night in a sunny yellow Rebecca Vallance dress, which showed off her cleavage and accentuated her toned figure.Hello sunshine! Pia Miller showed off her cleavage in a bright yellow dress as she celebrated her 37th birthday with a lavish birthday dinner on Monday night She let her frock do the talking by wearing minimal jewellery, and showed off her natural beauty in barely any makeup and her hair out in soft waves.Pia was joined by several friends at popular Italian restaurant Cafe Nino in Woollahra. She also enjoyed a Zoom party with friends and family who could not make the dinner, including her brother Jesus Loyola..Earlier in the day, the exotic beauty was showered with several bunches of flowers and gifts, including a huge bouquet of peonies and white roses from her beau Patrick. Fun with friends: Pia was joined by several friends at popular Italian restaurant Cafe Nino in WoollahraThe Australian actress marked the occasion by sharing a professional, black-and-white photo of herself to Instagram.Pia flaunted her beautiful smile in the image, and revealed in the accompanying caption that she was smiling out of 'gratitude'.'BIG gratitude smile this week! Another year older,' she wrote, adding the hashtag #ThisIs37.Spoiled: Earlier in the day, the exotic beauty was showered with several bunches of flowers and gifts, including a huge bouquet of peonies and white roses from her beau PatrickAlso joining in on the birthday celebrations was her youngest son, Lennox, 14, who shared a tribute to his mother on his own Instagram account. 'Happy Birthday mum. Love you,' he captioned the photo.The birthday celebrations come after fans were stunned to learn Pia's real age last month.The mother-of-two's age has often come under scrutiny, with many fans suspecting she may be much younger than she claims to be.But after being pestered by fans on Instagram, the Chilean-born beauty revealed at the time she was 36, and turning 37 in November.The revelation came as a shock to some people, as Pia still physically appears to be in her mid-twenties.In photos taken with her teenage sons, Lennox and Isaiah, 17, Pia looks more like their big sister than their mother.Gratitude! The Australian actress marked the occasion by sharing a professional, black-and-white photo of herself to InstagramSeparated: Pia has been forcibly separated from her multi-millionaire American talent agent boyfriend, Patrick Whitesell, due to the coronavirus pandemic. He is currently residing in Los Angeles, while she remains in Sydney