Lewis bears no grudge with Ennis despite her breaking her 12-year-old British heptathlon record in Gotzis last month and instead claimed the 26-year-old could dominate the sport for years to come.
Ennis' total of 6,906 points in Austria blew away her main rival and 2011 World Championship conqueror Tatyana Chernova and with the Olympics less than two months away she is the firm favourite to secure the biggest prize of all.
But Lewis, who claimed Olympic gold in Sydney in 2000, believes Ennis' serene outlook will be her biggest asset ahead of her next outing, the Olympic trials next weekend.
"I think we've come to expect her to perform well so she deserves to be the big hope for the Olympics and we'll see what she does when she competes on August 3 and 4," said Lewis.
"I think she'll cope with the pressure, she is well within her capabilities to take it in her stride. She's a pretty level-headed person, so she'll be fine.
"There's nothing she needs to work on, she just needs to keep her head down, keep doing what she's doing and she'll be fine.
"She is in really good shape, she really is, I think she was primed to break my record, so onwards and upwards, she really needs to perform well in August though.
"She's got a lot to look forward to, generally Team GB are in a good place, definitely from an athletics point of view we've had some great performances already this year."
Lewis was present at the opening of the new Holiday Inn and Staybridge Suites London-Stratford City overlooking the Olympic Park on Tuesday and the 39-year-old admits she wishes she could join Ennis and co at the Games.
She said: "I've got a gold medal, so you can't be disappointed with that, but it would have been lovely to compete at the Olympic Stadium.
"I'll be there though, I may not be competing but I'll be there.
"The process of getting to this point will be part of my memory forever and I can't wait for the start of the Games now."