"Layer Cake" star Sienna Miller has reportedly "caused an issue" between British model Cara Delevingne and "Fast & Furious" actress Michelle Rodriguez that resulted to their split. Sources told the Daily Mail that Sienna Miller "seems a bit obsessed" with the model.

Although the "Layer Cake" actress is a mother to an 11-month old daughter with her fiancé Tom Sturridge, the 32-year-old actress seemed to be fond of spending her time with supermodel Cara Delevingne.

"Sienna is relentless about wanting to spend time with Cara. She seems a bit obsessed," a source told the Daily Mail.

The unknown source also said, "When Cara was dating US actress Michelle Rodriguez, Sienna was always getting involved and it caused an issue,"

Last year, Sienna Miller and Cara Delevingne were reportedly caught kissing and being intimate with each other during the Met Ball in New York City, which the "Fast & Furious" star strongly disapproves.

This seemed to be the cause of the Cara Delevingne and Michelle Rodriguez split in April, Fashion & Style reported.

The 21-year-old supermodel even revealed that she has a pet name for the "Layer Cake" actress and designer.

"She's my Schnoyster. We're very much 'schnoistering,'" Michelle Rodriguez's former girlfriend reportedly said.

Meanwhile, the "Fast & Furious" star seemed to have moved on from the Cara Delevingne and Michelle Rodriguez split as she focused on staying fit.

Michelle Rodriguez was seen with her stunningly fit body as she wore a white baggy muscle-tee, bright trainers and pants right after hitting the gym in Santa Monica on Wednesday.

The "Fast & Furious'" star was also rumored to be with actress Evan Rachel Wood after they reportedly hooked up in the recent "Evening for Women" event in Los Angeles.

However, the 26-year old actres, who recently got divorced, took to Twitter her clarifications on the issue and denied the rumor.