Allesandra is a certified clinical sexologist who has worked as a therapist with couples and families for years, as well as appearing on numerous TV shows, hosting her own radio show and has written several books on love and relationships.
She has 622,000 Instagram followers and frequently uploads selfies and informational videos to her account - you can follow her on Instagram here @allesarampolla.
“I am thrilled to be joining John and Mel in Australia’s biggest social experiment,” Alessandra said in a statement.
“With my particular expertise, I hope to contribute to the complex mix of components that ensure marriages not only work but thrive in the long haul,” she added.
“One of my strongest core beliefs is that sexual expression and compatibility are vital in building, nourishing and maintaining healthy romantic relationships, and it is my pleasure to help guide our participants in balancing this important factor in their brave quest for love.”
Trisha confirmed her exit from the program in a statement in early September.
"After seven seasons of Married At First Sight I have decided to step back from the television series to focus on my writing, research and neuropsychotherapy," Trisha said in a statement to 9Entertainment.
"I've been involved right from the beginning in the challenge of bringing this social experiment to television. The program provides a platform for an ongoing conversation on relationships and I wish the program continued success and hope future participants find everlasting love."
Channel Nine also thanked Trisha for "the extraordinary contribution she has made to the success of Married At First Sight."
"She showed great courage joining this very unconventional social experiment in its first short series and helped transform it into the hugely successful franchise it is today. We wish her all the best as she re-directs her energies back into her professional career."
Season eight of Married At First Sight will premiere on Channel Nine in early 2021.