AMERICAN actor Josh Gad has revealed his friend’s son died in the Florida school massacre, and has led the call among Hollywood celebrities for tighter gun control laws.

The Frozen favourite wrote a heart-wrenching tweet overnight upon finding out about the death of his friend, after earlier revealing: ‘A child of one of our friend’s has a bullet in his chest and is (in a) critical condition because a 19 year old had access to military weapon. Pretend it’s normal. It’s not.’

The 36-year-old also vowed to make it his ‘life’s goal’ to support those who challenge politicians who receive money from the National Rifle Association, which includes the US President and a host of senators.

During his campaign to become President in 2016, it was reported Donald Trump benefited from $26 million ($21 million USD) in NRA donations backing his candidacy.

In return, Trump has spoken at several NRA events and pledged his loyalty to the group.

Kim Kardashian is also among a host of celebrities calling for a review of gun laws after a gunman went on a rampage at a school in Florida on Valentine’s Day.

Expelled student Nikolas Cruz, 19, returned to Marjory Stoneman Douglas High School armed with an assault rifle and opened fire at students and teachers.

Chilling images posted on Instagram show the shooter, who remains in police custody, posing with guns and knives as fellow pupils admit they “knew he would shoot up the school”.

His actions prompted the likes of singer Nancy Sinatra, talk show host Ellen DeGeneres and actress Reese Witherspoon to call for stronger gun restrictions in the wake of the atrocity on Wednesday.

The Keeping Up With The Kardashians star called on the US government to do more to protect children and teachers.

Writing on Twitter, she said: “We owe it to our children and our teachers to keep them safe while at school. Prayers won’t do this: action will.

“Congress, please do your job and protect Americans from senseless gun violence.”

She also retweeted others stating that after a shoe bomber tried to blow up a plane, passengers are now required to take off their shoes, yet despite 1606 mass shootings in the US gun law remains the same

Mark Ruffalo agreed: ‘Prayers without accordant action are silent lies told to oneself, heard by no God, amounting to nothing. Action is the language of truth, the prayers of the Saints.’

Mia Farrow replied to President Donald Trump’s tweet, which offered “prayers and condolences” by saying, “Sir, we need more than prayers and condolences. We need rational gun legislation”.

She also reacted to Mr Trump’s tweet this morning that there were “so many signs that the Florida shooter was mentally disturbed, even expelled from school for bad and erratic behaviour. Neighbours and classmates knew he was a big problem. Must always report such instances to authorities, again and again!”

Elizabeth Banks shared an Instagram post where “thoughts and prayers” was crossed out and “policy and change” was written underneath it.

Actress Julianne Moore tweeted: “The 18th school shooting in the US since January. It is heartbreaking. What will it take to change our nation’s gun laws ???”

Nancy Sinatra called on the Republican Party to pass “sensible” gun laws immediately.

She added: “Seventeen more of our young people dead, killed by a shooter with an automatic weapon he had no business having.”

Talk show host Ellen DeGeneres said: “No words, no actions, no laws are enough until we end this epidemic of school shootings in our country.”

Actress Reese Witherspoon said she was “heartbroken” by the attack, adding “enough is enough”.

Florida Governor Rick Scott, a Republican, said it was an act of “pure evil” but refused to discuss gun control in a press conference.

House Speaker Paul Ryan said the shooting should not lead to taking away Americans’ rights to own guns.

Broward County Sheriff Scott Israel earlier said that the suspect had at least one AR-15 rifle and multiple magazines.

While some fatalities were found outside the building, most were inside, he added.

The school had been placed on lockdown before the suspect was apprehended.