Robert Pattinson is reportedly "still broken up" over his split from Kristen Stewart.
The 28-year-old actor - who separated from the 'Snow White and the Huntsman' star after she had an affair with director Rupert Sanders in 2012 - is believed to still have feelings for his ex, which is causing his new girlfriend, FKA twigs, to feel like she is second best.
A source revealed to RadarOnline.com: "Everyone knows he is still broken up over Kristen.
"I am sure that [FKA twigs] is worried that she is a rebound."
Meanwhile, a second source previously revealed that the 'Twilight' star has "no problem" introducing his new beau to Kristen.
A source explained: "Rob and Kristen are inevitably going to cross paths. Tahliah (FKA twigs) is a huge part of his life and will be living with him when they are in LA.
"Rob has no problem at all introducing them to each other."
Despite the rumours that Robert is pining for his ex-girlfriend, other reports suggest that he is "falling in love" with the 'Two Weeks' hitmaker.
The insider revealed: "[Rob] wasn't even that disappointed that his film ['Idol's Eye'] got pushed because it means he can spend more time following her around on tour, he's her number one fan.
"They're very serious, Rob's only seeing her, he's not dating anyone else or even looking at other girls. He's really happy, they're falling in love, he's totally wrapped up in her."
Tagged in Kristen Stewart Robert Pattinson FKA Twigs