Julia Roberts steps out for star studded Rolling Stones concert along with Robert Downey Jr. who revealed that NASA named a rock on Mars after the legendary band

The stars flocked to Pasadena, California on Thursday night to rock out with the Rolling Stones who are currently on the last leg of their world tour. 

A-list celebrities like Julia Roberts and Robert Downey Jr., were spotted outside the Rose Bowl Stadium where the band brought down the house.

Downey was not only there to enjoy the show, he actually took the stage before the concert began to announce (on behalf of NASA) that a rock on Mars had been named after the Stones.

Star studded: A-list celebrities like Julia Roberts and Robert Downey Jr., were spotted outside the Rose Bowl Stadium where the band brought down the house in Pasadena, California on Thursday

Star studded: A-list celebrities like Julia Roberts and Robert Downey Jr., were spotted outside the Rose Bowl Stadium where the band brought down the house in Pasadena, California on Thursday

Roberts, 51, was spotted looking casual in a short, long-sleeve black dress, flat Oxford shoes and her clear rimmed glasses outside of the stadium. 

She was joined by her husband Danny Moder who she has been married to since 2002. They share three children together. 

Many high-profile celebs were on hand for the gig including rockers Bruce Springsteen, Billy Idol and Nikki Sixx, actors Val Kilmer, Elizabeth Olsen, Andy Garcia and producer Jimmy Iovine.

Robert Downey Jr. had a very special role before the show, which the 54-year-old had teased earlier in the day on social media.

Spotted: Julia Roberts, 51, was spotted looking casual outside of the stadium, joined by her husband Danny Moder

Spotted: Julia Roberts, 51, was spotted looking casual outside of the stadium, joined by her husband Danny Moder

Special guest: Robert Downey Jr. was seen before the show outside in the parking lot, he played an important role before the show
What is to come: The Iron Man star teased a big announcement earlier in the day

Special guest: Robert Downey Jr. was seen before the show outside in the parking lot, he played an important role before the show

'What a blast:' Val Kilmer couldn't hide his excitement about the show

'What a blast:' Val Kilmer couldn't hide his excitement about the show

'This may be the most exciting thing I've ever done,' he said on social media.

The Iron Man star was spotted outside of the show wearing a trendy look of grey slacks, a T-shirt and a flannel over top with some funky high top sneakers.

He changed before taking the stage a little while later in a white T-shirt and black suit.

Wow! Downey took the stage before the concert began to announce on behalf of NASA that a rock on Mars had been named after the Stones

Wow! Downey took the stage before the concert began to announce on behalf of NASA that a rock on Mars had been named after the Stones

'This may be the most exciting thing I've ever done,' he said on social media.

'This may be the most exciting thing I've ever done,' he said on social media.

Out of this world: NASA named a rock on Mars after the band after it was spotted rolling across the planet on their InSight robotic lander

Out of this world: NASA named a rock on Mars after the band after it was spotted rolling across the planet on their InSight robotic lander

The star was psyched to announce that NASA had named a rock on Mars after the band after it was spotted rolling across the planet on their InSight robotic lander. 

Excited about the announcement Mick Jagger told crowds at the concert: 'NASA has given us something we have always dreamed of, our very own rock on Mars. 

'I can’t believe it. I want to bring it back and put it on our mantelpiece.'  

Excited about the announcement Mick Jagger told crowds at the concert: 'NASA has given us something we have always dreamed of, our very own rock on Mars.

Excited about the announcement Mick Jagger told crowds at the concert: 'NASA has given us something we have always dreamed of, our very own rock on Mars.

Lori Glaze of Nasa's Planetary Science Division said: 'The name Rolling Stones Rock is a perfect fit. 

'Part of Nasa’s charter is to share our work with different audiences, and when we found out the Stones would be in Pasadena honouring them seemed like a fun way to reach fans all over the world.'

The Rolling Stones are currently winding down their No Filter Tour. It ends on August 31 with a show in Miami Gardens, Florida.   

Big finish: The Rolling Stones are currently winding down their No Filter Tour. It ends on August 31 with a show in Miami Gardens, Florida

Big finish: The Rolling Stones are currently winding down their No Filter Tour. It ends on August 31 with a show in Miami Gardens, Florida

Julia Roberts steps out at Rolling Stones concert where Robert Downey Jr made a NASA announcement

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