Lohan has also expressed her support for Tiffany's father Donald Trump.
'THIS IS our president,' Lohan tweeted. 'Stop #bullying him & start trusting him. Thank you personally for supporting #THEUSA,' she tweeted.
During a Facebook Live Q&A session with the Daily Mail in February 2017, Lohan urged Americans to 'join him', adding: 'I think always in the public eye you're going to get scrutinized. He is the president - we have to join him. If you can't beat him, join him.'
Meanwhile, Tiffany has been making the most of her summer break from school, partying in the Hamptons, visiting Trump Winery in Virginia, and catching up with her mother Marla Maples during a trip to the UK.
The two enjoyed a quiet weekend in the picturesque English countryside, with Marla posting Instagram snaps of the pair in Glastonbury.
They then went to London, taking in the sights and posing in Trafalgar Square.
'Last day in #London with Tiffany under the gaze of the most blue skies and guarded by the bronze Lions of #TrifalgarSquare,' she wrote on July 27.
'With gratitude, I thank England and all our friends there for memorable times surrounded by love,' she added.
From there, it seems, Tiffany may have separated from her mom to head on to Greece.
Source: dailymail.co.uk