It looks as though Jennifer Aniston has to keep a close eye on her fiancé Justin Theroux these days. Rumor has it that the actress was livid when she found out that the actor was getting up close and personal with his co-star, Liv Tyler.

Jennifer Aniston, Justin Theroux Put Their Wedding On Hold Again?

According to Life & Style Weekly's print edition this week, Aniston was furious when Theroux and Tyler were allegedly "racking up alone time" on the set of their HBO drama, The Leftovers.

A source told the magazine their "coziness" made Aniston rage with jealously. A rep for both Aniston and Theroux, though, has denied the claims.

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The insider tells the mag: "She went off on Justin and grilled him over the nature of his relationship with Liv. She seems to view Liv as the other woman - and she can't stand her."

Meanwhile, Aniston has recently admitted that she stays home more often these days because of the "cyber bullying" she gets on the Internet.

The actress says that internet bullying has gotten so bad in recent years that it's forced her to keep her life as private as possible.

Aniston told the UK's Express on Tuesday: "You do the best you can but it feels like it's getting worse and very nasty because of bullying on the internet. Even movie critics don't just comment on the film, they tear people apart on a human level. I don't know why that is happening but it is...we just stay home so there really isn't anything to report."