ABC has announced The Bachelor's twelfth installment will premiere on Monday, March 17 at 10PM ET/PT.

Unlike The Bachelor's previous two installments -- both of which premiered with 90-minute episodes that aired immediately after Dancing with the Stars' debut broadcasts -- The Bachelor's upcoming twelfth edition will instead begin with a one-hour episode in its regular Mondays at 10PM ET/PT time period.

In addition, while last spring's The Bachelor: Officer and a Gentleman ran 90-minute episodes all season long and this fall's eleventh The Bachelor season started with three 90-minute episode broadcasts, The Bachelor 12 is currently scheduled to only air hour-long episodes.

Similar to this fall's ABC Monday night schedule, Samantha Who? -- a half-hour Christina Applegate sitcom -- will air in the half-hour period between Dancing with the Stars' sixth-season 90-minute performance episodes and The Bachelor 12's one-hour episodes. 

Dancing with the Stars 6 will debut with a 90-minute performance episode broadcast on March 17 in its regular Mondays at 8PM ET/PT time period.  ABC will then air Dancing with the Stars' first sixth-season results show broadcast on March 25 in its regular Tuesdays at 9PM ET/PT time slot.

In addition, ABC has also revealed the previously announced fourth seasons of both Wife Swap and Supernanny will premiere on Wednesday, January 2.

Wife Swap will debut in its regular Wednesdays at 8PM ET/PT time period and serve as the lead-in for Supernanny, which will premiere with special back-to-back one-hour episodes beginning at 9PM ET/PT.  ABC's new drama series Cashmere Mafia will premiere in its regular Wednesdays at 10PM ET/PT time slot on January 9 following a special premiere broadcast on Thursday, January 3.

Oprah Winfrey's The Big Give -- a new reality competition series executive produced by The Amazing Race co-creators Bertram van Munster and Elise Doganieri for Winfrey's Harpo Productions that will follow 10 people who are given money and other resources before being challenged to find "dramatic and emotional" ways to spend it on others -- is scheduled to premiere on Sunday, March 2 at 9PM on ABC.