Guy proposed to his long-time girlfriend, Jules Egan, during Christmas 2007. He proposed with a white gold ring set with 140 diamonds. Guy & Jules married in May 2008 at the same Manly chapel where Nicole Kidman married Keith Urban. The couple met 13 years ago at the Assemblies of God Paradise Community Church they attended with their families in Adelaide. Guy was 13 and Jules was 15. Guests at the ceremony included Ian "Dicko" Dickson, Jennifer Hawkins, Shannon Noll, The Veronicas, Dean Geyer, and former NRL player Jason Stevens.
Guy performed at the 2007 Country Music Awards.
Guy won the 'Fave Aussie' award at the 2006 Nickelodeon Kids' Choice Awards. The award was presented to him by Bindi Irwin, who stood in for her late father.
The following lists Sebastian's Australian Idol performances:
Adelaide Audition - Ribbon in the Sky - (Stevie Wonder)
Top 100 - Back at One - (Brian McKnight)
Top 75 - Over the Rainbow - (Judy Garland)
Semi Final Group 2 - What a Wonderful World - (Louis Armstrong)
Top 12 (70's) - The Love You Save - (Jackson Five)
Top 10 (#1 Hits) - Everything I Do (I Do It for You) - (Bryan Adams)
Top 8 (Aussie Hits) - You're the Voice - (John Farnham)
Top 6 (80's) - When Doves Cry - (Prince)
Up, Close & Personal - When I Get You Alone - (Thicke)
Top 5 (R&B/Soul) - Hidden Agenda - (Craig David)
Top 5 (R&B/Soul) - Hello - (Lionel Richie)
Top 4 (Big Band) - The Way You Look Tonight - (Frank Sinatra)
Top 4 (Big Band) - Hit the Road Jack - (Ray Charles)
Top 3 (60's) - Can't Take My Eyes Off You - (Frankie Valli & The Four Seasons)
Top 3 (60's) - Climb Every Mountain - (Julie Andrews)
Final 2 - I'll Be There - (Jackson Five)
Final 2 - Crazy in Love - (Beyonce Knowles)
Final 2 - Angels Brought Me Here – (Finale)
While attending the Paradise Community Church, Guy joined their youth band, Planetshakers, and toured Australia and the United States.
In 2004, Guy performed What A Wonderful World at the World Idol competition. In the final judging he was rated 7th out of 11th.
Guy is an Ambassador for World Vision.
Guy attended King's Baptist Grammar School.
Before winning Australian Idol, Guy was a school music teacher and an audio engineer.
Guy's father is half Sri Lankan and half Malaysian. His mother is half English and half Spanish. He has three brothers - younger brothers Chris and Jeremy and an older brother, Ollie.
In September 2006, Guy was listed at #42 in TV Week's 'Top 50 most memorable moments on Australian television' list for winning Australian Idol.
In 2003, Guy submitted his song No More for the PilotPen competition, which he wrote, sang and produced in his studio. He won the competition, and the song has been a favourite request to be re-recorded and released commercially since his fans found it.
Guy plays piano, guitar and drums.
Guy: (on getting married to girlfriend, Julie) We're taking it slow. The only answer I have is that I'm not in the head space of getting married. I'd be too selfish as a husband because I'm so caught up in trying to get my stuff going.
Guy: The danger of Idol is you're suddenly propelled into stardom where people are giving you unnecessary things and girls are throwing themselves at you. You need to ground yourself with the things that are important to you. For me, that's friends, family and the accountability I have to my fans.
Guy: I dropped off the face of the earth for over 5 months, refusing press so I could make this album. People in management and my label were a little worried that the lack of exposure would cause people to forget and move on. Despite their fear I stood firm and went away in hope of making the best album I could in the time given. To come back after that time and have Out With My Baby go number 1 was an absolute delight for me.
Guy: Every time someone talks to me about the charts I kinda freak out a little. If you told me a year and a half ago that one of my songs were going to be played on the hot 30, even at number 30, I would have done cartwheels and celebrated for a month. So now it's almost like if I rank number 2 on debut, I should be disappointed.
Guy: It's beyond anything I have ever even dreamt of to enter the charts at number 1. My entry into the music industry is a strange one. With this whole strange process, there's no building into it, it really is straight to the top, regardless of the quality of the release. I guess the only way to go is down, that is said with a realistic frame of mind as opposed to a pessimistic one.
Guy: (on making the Top 50 most memorable moments on Australian television for winning Australian Idol) It was the most amazing feeling in the world. It was surreal and felt like all my dreams were coming true. The whole country was tuned in - even if Idol wasn't their thing, everyone was talking about it! It was great sharing it with Shannon [Noll] - we're such great mates so I felt a bit guilty. I couldn't believe it!.
Guy: (on taking part in the reality show, It Takes Two) I ummed and aahed about it for a while. I wasn't sure about entering TV land again, but the thing that matters in music is music itself. I don't care about the coolness factor.