The Sahara star, who reached the milestone on 4 November (09), couldn't believe his eyes when he woke up on his big day to find the 1981 Chevrolet Camaro Z28 sitting in his driveway.
He says, "Camilla got it for me for my 40th. (It's) very cool because my middle brother Pat, it's what he drove in high school.
"When I was 12 and he was 18, he'd come home on a Friday or Saturday night at 12.30am and he'd come inside and wake me up and I'd run out in my underwear and get in the passenger seat and listen to rock n' roll in the driveway."
McConaughey reveals it was the first car he ever drove - and now he can cruise around in his very own model.
He continues, "My mum and dad would go out of town and he (Pat) would let me drive it, all around Texas. It had a concord system in there...
"At that time it was a larger than life hot rod time machine. So I've always talked about it, then I woke up on my 40th and there was this beauty sitting in the driveway."
"He's not good at it at all... He tries to mix things up... Levi's actually better at Portuguese than he is, and Levi's 18 months (old)." MATTHEW McCONAUGHEY's girlfriend CAMILA ALVES insists the actor's young son has a better command of mum's native tongue than his father.
The Sahara star and Camila Alves were out partying when they stumbled into a gay bar and became the centre of attention.
But it had nothing to do with the stunning Brazilian - the lesbians all wanted to get close to her man.
Alves says, "We go in and I'm like, 'Yes! Victory!' because everywhere we go, everybody loves Matthew - I do too - but sometimes you want to not have people bother you. We're in a lesbian bar, now it's my turn - people are gonna hit on me. That didn't happen.
"He (McConaughey) was turning lesbian women straight. We had to have the bar security come and stand in front of us... You just can't win with the guy. He has it and you gotta love it."
The actor booked out the Beau Rivage restaurant in Malibu for a small group of pals to celebrate Alves turning 27 - just weeks after she gave birth to the couple's second child, daughter Vida, on 3 January (10).
McConaughey, 40, was snapped arriving at the eaterie carrying a massive bunch of balloons for his partner.
A source tells People.com, "After spending the past three weeks at home with baby Vida, Camila seemed very excited to be out celebrating her special day. Matthew also looked great and was very attentive and loving toward Camila. It was obvious that he wanted Camila to enjoy her special night."
The baby was born on 3 January (10) and the actor and his girlfriend Camila Alves have been careful to keep their new baby girl out of the public's eye - until now.
Accompanying the black and white hospital bed snap of mum, dad and baby, McConaughey writes, "Here's a pic of our latest family member Vida Alves McConaughey. Thanks for all your well wishes our way, the future's lookin bright, just keep livin (sic)."
McConaughey and TV presenter Alves also have a toddler, called Levi.
Brazilian tradition dictates Alves must give her body 40 days to acclimatise following the 3 January (10) birth - and that means no exercise, and especially no sex.
The TV presenter tells StyleList.com, "Where I come from, we believe in something we call a 40-day break after the baby. You have to let your body do its own thing. You give it time to recover and let everything settle down. In a way, it is nice. There is not so much pressure. You kind of respect all the hard work your body has just done and give it a break. For these 40 days you really take it easy. By that I mean no sex, light, healthy food, no trips to the gym. Then, after 40 days, you are good to go."
Three weeks into her recovery, Alves admits she can't wait to get active again - and is counting down the days to 14 February (10), which appropriately coincides with Valentine's Day.
Alves adds, "I confess, I am getting a little anxious to workout. I miss it. Not just to get my body back in shape, but for me, for my head!"
Matthew McConaughey's New Year has started on a high -- he's become a father for the second time.
The actor's girlfriend, Camila Alves, gave birth to baby girl Vida on Sunday.
And the couple is delighted with its new arrival, who weighed in at seven pounds, seven ounces.
In a post on his official Web site entitled 'New Year and New Baby!', McConaughey writes, “Happy New Year everybody!!! Vida is Portuguese for ‘life’ and that’s what God gave us this morning. Camila’s recovering wonderfully and we are both truly honored to welcome this little lady into our family. Thanks for all your well wishes and prayers along the way. Another blessed day, we give thanks, just keep livin’. Matthew and Camila.”
McConaughey and Alves already have a son, Levi, 17 months.
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The actor's girlfriend, Camila Alves, gave birth to baby girl Vida on Sunday (03Jan10).
And the couple is delighted with their new arrival, who weighed in at seven pounds, seven ounces (3.4 kilograms).
In a post on his official website entitled 'New Year and New Baby!', McConaughey writes, “Happy New Year everybody!!! Vida is Portuguese for ‘life’ and that’s what God gave us this morning. Camila’s recovering wonderfully and we are both truly honored to welcome this little lady into our family. Thanks for all your well wishes and prayers along the way. Another blessed day, we give thanks, just keep livin’. Matthew and Camila.”
McConaughey and Alves already have a son, Levi, 17 months.
The Brazilian model and handbag designer, who announced she is expecting her second child with the actor in June (09), will host competitive hairstyling show Shear Genius.
The series is set to launch its third season in February (10) with Alves as its star. She replaces former host, veteran actress Jaclyn Smith.
McConaughey and Alves have been together since 2007.
It seems it's a good time to be close to the Sahara star - McConaughey is also working on a deal with Fox TV executives to turn his brother Rooster into a cartoon star.
Rooster Tales will chronicle the adventures of a beer-drinking sheriff, who marries a beautiful Mexican woman with an extended 114-member family.
The couple was enjoying an evening out in Hollywood on Saturday (31Oct09), attending the annual costume party thrown by Heidi Klum and Seal.
But after they left the fancy dress event, the pair allegedly became embroiled in a furious row as they got into their car.
Witness Ramon Alves tells the New York Post, "She was mad. She jumped in the front seat and (Doug) was holding her around the neck saying, 'Relax, relax.'"
The argument then reached a climax when Reinhardt allegedly threw the hotel heiress' cellphone through the car window - forcing Hilton to stop the vehicle and search for the device.
A second witness adds, "She was staggering down the street, up and down. And the guy they were with was trying to block anyone from taking pictures. It got very physical. The limo driver was horrified!"