"No harm was done and Tucker was rescued," an eyewitness told E!. "AAA was able to open the door quickly."
A terrifying moment for any parent and we're, of course, happy Tucker is safe.
Melissa Joan Hart
Melissa Joan Hart's son rescued from locked car
TUSTIN, CA - SEPTEMBER 14: Actress Melissa Joan Hart and her son Tucker Wilkerson appear at the 2nd Annual Super Max's Loom-A-Thon at Pepper Tree Park on September 14, 2014 in Tustin, California. (Photo by Daniel Knighton/WireImage)
BRIDGEPORT, CT - APRIL 27: (L-R) Brady Wilkerson, Mason Wilkerson, Tucker Wilkerson, and actress Melissa Joan Hart attend Melissa Joan Hart And Her Sons Tucker, Braydon, And Mason Meet Mickey Mouse And Minnie Mouse At A Performance Of Disney Junior Live On Tour! Pirate & Princess Adventure at Webster Bank Arena at Harbor Yard on April 27, 2014 in Bridgeport. (Photo by Thos Robinson/Getty Images for Feld Entertainment)
HOLLYWOOD, CA - NOVEMBER 19: Actress Melissa Joan Hart (R), husband Mark Wilkerson and children attend the premiere of Walt Disney Animation Studios' 'Frozen' at the El Capitan Theatre on November 19, 2013 in Hollywood, California. (Photo by David Livingston/Getty Images)
LOS ANGELES, CA - OCTOBER 22: Mark Wilkerson speaks to the media at the filming of Course of the Nature's music video 'Anger Cage' at Ben Kitay Studios on October 22, 2007 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)
CT - JULY 12: Melissa Joan Hart hosts My Magic Room PJ Party to reveal Tucker's newly decorated room with Disney Paint on July 12, 2013 in CT. (Photo by Andrew H. Walker/Getty Images for Disney Paint)
HOLLYWOOD, CA- JUNE 17: Actress Melissa Joan Hart and son Tucker McFadden Wilkerson attend the world premiere of 'Monsters University' at the El Capitan Theatre on June 17, 2013 in Hollywood, California.(Photo by Jeffrey Mayer/WireImage)
UNIVERSAL CITY, CA - JUNE 22: Actress Melissa Joan Hart, husband Mark Wilkerson and children Braydon, Mason and Tucker arrive at the Los Angeles premiere of 'Despicable Me 2' at Universal CityWalk on June 22, 2013 in Universal City, California. (Photo by Gregg DeGuire/WireImage)
Actress Melissa Joan Hart and husband Mark Wilkerson attend the 'Love, Loss, and What I Wore' new cast member celebration at Pio Pio 8 on April 1, 2010 in New York City.
NEW YORK - NOVEMBER 05: Melissa Joan Hart and Mark Wilkerson attend the 6th Annual Lucky Shops hosted by Lucky Magazine at Metropolitan Pavilion on November 5, 2009 in New York City. (Photo by Jamie McCarthy/WireImage for Lucky Magazine)
LOS ANGELES, CA - OCTOBER 22: (L-R) Mason, Mark Wilkerson, and Melissa Joan Hart speak to the media at the filming of Course of the Nature's music video 'Anger Cage' at Ben Kitay Studios on October 22, 2007 in Los Angeles, California. (Photo by Noel Vasquez/Getty Images)