The 51-year-old launched an excoriating tirade on this morning’s edition of the ITV breakfast show as he criticised their acceptance speeches for being politically motivated.
“Why are they trying to be the next Martin Luther King?” he asked co-host Susanna Reid.
The former newspaper editor went on: "They should stick to acting.” He then continued that the SAG Awards were held to honour stars for their acting and should not be used as a political platform.
Piers said: “It’s an awards ceremony, it’s not a chance for you to be the new Martin Luther King.
“At what point do these ceremonies change from a being celebration of movies?”
He added: “It’s all building up for the Oscars to be not be an event about movies but for the stars to compete about who can scream the loudest about Trump.”
Piers’ comments come as a number of Hollywood stars slammed Trump at the glitzy award ceremony including Stranger Things actor David Harbour.
Piers Morgan hits out at celebrities on the Screen Actors Guild Awards
Piers Morgan hits out at celebrities on the Screen Actors Guild Awards 2017
At what point do these ceremonies change from a being celebration of movies?
As he went up to collect the drama's gong in which he plays Chief of Police Jim Hopper, he was heard telling the audience: "On behalf of this fearless and talented cast we'd like to thank Netflix."
David continued: "I would just like to say that in light of all that is going on in the world today, it is difficult to celebrate the already celebrated Stranger Things.
"But, this award from you, who take your craft so seriously and earnestly believe, like me, that great acting can change the world, is a call to arms to our fellow craftsmen and women to go deeper.”
Despite Piers’ rant against politicised celebrities, he has spoken out against Trump’s immigration ban.
Piers Morgan blasts celebrities on Good Morning Britain
Piers Morgan's most famous Twitter spats
Thu, September 22, 2016
Good Morning Britain host, Piers Morgan's most outrageous quotes and Twitter spats.
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Piers Morgan's most outrageous quotes
Stranger Things star David Harbour hits out at Trump at the Screen Actors Guild Awards
He challenged a Trump supporter over the executive order that prevents nationals from seven countries that include Libya, Sudan, Yeman, Somalia, Iran, Iraq and Syria.
“How can you have people with green cards dragged away and handcuffed?” he asked Ben Ferguson, who was speaking to Good Morning Britain via live link.
He went on to say to the Trump supporter: “The country [America] is founded on immigrants.”
Good Morning Britain airs weekdays on ITV at 6am.