Oprah admits filming Lohan's documentary series has been 'bumpy'

In this Monday, Jan. 6, 2014 photo, U.S. actress Lindsay Lohan blows a kiss to Chinese fans as she attends the Sohu Fashion Achievement Awards ceremony in Shanghai, China. (AP Photo)

Oprah Winfrey admits filming Lindsay Lohan's documentary series has been "bumpy".

The media mogul says working with the troubled actress on the show - which will air on her OWN network in March - hasn't always gone smoothly, but insists there has been nothing out of the ordinary with making the programmes.

Asked if 'Lindsay' is still filming, she told E! News: "As far as I know we are - what do you know? There have been bumps, that's life. It's been bumpy, but as far as I know we are still filming."

Despite reports the 'Mean Girls' actress has caused problems for the series' shooting schedule, Oprah said she spoke with the 27-year-old star earlier this week after she initially received a text from Lindsay - though the talk show host didn't realise she was in London when she called her.

And asked where the actress is at the moment, Oprah joked: "You would know more."

In clips from the eight-part series which were recently screened for critics, Oprah could be seen fuming with Lindsay after she refused to take part in scheduled filming.

In the footage, Oprah says: "This is just what everyone warned me would happen. And it is."

In August, Oprah sat down with Lindsay for her first TV interview since leaving a 90-day court-ordered stint in rehab, and it has been claimed the troubled star received $2 million and the eight-episode series - which chronicles her attempts to relaunch her career and battle to stay sober - in return for the televised chat.