"I'm here today to honour our democracy & its enduring values. I will never stop believing in our country & its future. #Inauguration" Clinton tweeted just ahead of Trump's inauguration.
Clinton, 69, was accompanied by her husband former President Bill Clinton and was seated with other former presidents George Bush and Jimmy carter and their wives in the balcony of the Capitol, just steps away from where Trump will take his oath of office.
Clinton, dressed in white, has been gracious in her defeat gradually attending a handful of public events after her crushing defeat in the bitter November 8 elections, marked by Trump's open threats of "locking her (Clinton) up" post his victory in the election.
Trump, however, has praised Clinton and her husband Bill in his first television interview after winning the election, describing the woman he has vowed to throw into prison as "very strong and very smart".