UPDATED: The actor had played the on-again, off-again love interest to Emmy Rossum's Fiona for three seasons and could return for one or two episodes.

Fiona Gallagher has apparently seen the last of Jimmy on Showtime's Shameless.

Justin Chatwin, who played the love interest to Emmy Rossum's Fiona will not return to the Showtime drama, The Hollywood Reporter has confirmed. Producer John Wells made the announcement at a TV Academy Emmy panel for the series on Tuesday night in Los Angeles.

A Showtime rep confirms that Chatwin's days as a series regular have come to an end but that the actor could return for one or two episodes in season four.

The actor played the conman forced to turn straight for three seasons -- one season more than the U.K. series on which the Showtime adaptation is based. (James McAvoy played Steve in the original series.)

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During the recently wrapped third season, Chatwin's Jimmy spent the season navigating his secret marriage to the daughter of a drug kingpin (so she could remain in the U.S.) and a domesticated life with Fiona.

When the drug dealer's daughter is deported after she can't reach Jimmy to continue the guise of their marriage of convenience, Jimmy is last seen on a boat with a thug, who later returns to hand Fiona an envelope stuffed with cash. His death was presumed and not depicted on the series. (The character in the past had a penchant for disappearing when the pressure got to be too much but would always find his way back to Fiona.)

Showtime renewed Shameless -- and the rest of its Sunday night lineup -- in January. The drama was up year-over-year in its third season, prompting the renewal after three airings.

Chatwin is repped by UTA, Alchemy Entertainment and Sloane Offer.

Email: Lesley.Goldberg@thr.com; Twitter: @Snoodit