Bollywood star Katrina Kaif has potentially been having something stressful going on in her life that's causing her to lose sleep at night.

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On Wednesday, Bollywood Life reported that the Dhoom 3 star is getting up at 4 a.m. these days. While the site hinted that the reason could be due to problems she might be having with her alleged boyfriend Ranbir Kapoor, it looks like her lack of sleep is related more to work instead.

A source supposedly told the site that the reason for Kaif's lack of sleep is due to having to keep up with her exercise routine amid having a hectic schedule. Since she will apparently be performing her own stunts for the upcoming action flick Bang Bang, Kaif needs to work as hard as she can right now.

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The site also mentioned that major parts of the upcoming film are supposed to be shot in daylight so Kaif needs to start her workout routines as early as 6 a.m. The filming is said to take all day and ends during the late night hours so Kaif needs to make room for her exercise in the early morning.

As for her relationship rumors, there is still no official word from her or Kapoor if they are officially together or not.

"I can't say anything till any bit of it is official," Kaif said last month. "I might be in a relationship today, but tomorrow it might break. When I give my general opinion also on relationships, people misinterpret it. So I have stopped talking about these things."

Tags: Katrina Kaif Ranbir Kapoor bollywood