The One Direction star ended a three-year relationship with the fashion blogger in 2015, but sources tell The Sun newspaper that things between the pair are getting serious again after Eleanor flew to Los Angeles for work earlier this month (Feb17).

"It’s early days but they are an item again," one insider says. "They have a really special three years together and they have found it quite easy to find that spark between them again."

After splitting from Eleanor in 2015, Louis went on to have a brief fling with stylist Briana Jungwirth - the mother of his son Freddie - and the former couple recently celebrated the tot's first birthday in Los Angeles.

The 25-year-old has been single since he split from actress Danielle Campbell last month (Jan17). They went their separate ways following the death of his mother Johannah Deakin in December (16).

Louis was spotted earlier this month (Feb17) wearing a Titanic hoodie from French label Vetements - a favourite item of clothing Calder had also been photographed wearing, and the former lovebirds have also started following each other again on Instagram.

Despite breaking up with Danielle just weeks after his mother Johannah's death, a source told The Sun the actress has been very supportive to Louis as he grieves.

"It’s really sad because Danielle has been there for Louis through this horrible time," an insider adds. "She has stood by him, remained loyal and continued to be a great support, which is exactly what he needs. Sometimes these things just don’t work out and for Louis and Danielle this was the best way forward."